WWSD 2017 - The Fire Control Group (Trigger & Safety)
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- Опубликовано: 27 апр 2017
- This is our first deep dive into one of the components of our WWSD2017 AR15 modernization project - the fire control group.
We discuss the rationale as to why we chose this solution and the improvement it brings to the AR15 above and beyond the standard USGI FCG.
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nutnfancy can't say in 12 hours what you can in 12 minutes. Keep the videos coming!
Lol!
I like Nutnfancy's INTENDED honesty and how he only uses his own personal experience with a product to form an opinion. HOWEVER,
He will take 1 afternoon of shooting and go "this product is great, you can buy it without worry".
He has a video where he is reviewing a set of iron sights for AK rifles. And he shoots one group off a folding table that is about an inch and proclaims "1 MOA AK sights!!!" like it wasn't just a lucky grouping.
He may not intentionally be trying to mislead people, but his methods leave a LOT to be desired.
He kind of started the whole "gun channel" phenomenon back in the late '00s. That alone makes me appreciate his channel, even if it's been overshadowed by those who came after. I also approve of his take on prepping and SHTF, which most people take WAY too seriously and use it as bookends for their own personal social Darwinist fantasy.
CountArtha that point you made about his take on SHTF... I could never get past the amount of derp on his channel but that does kind of make me appreciate his effort even more.
He’s tactically constipated
you guys should make a WWSD playlist
They did! I'm watching it now! Cheers!
I like how the typical Ar15 safety doesn't engage unless the hammer is back, lets me know I need to charge the gun. However, I hadn't considered the need to make the gun safe while Mortaring to clear stuck cartridges, that makes sense and is a worthy cause.
maybe the violent act of mortaring can jiggle a light-weight match trigger? I don't know, I agree it's a stretch.
FWIW I have had an unfired cartridge stuck out of battery, because it was fireformed in another chamber, then reloaded without full length resizing. Wonder who made that mistake?
When I first read about popped primers jamming the trigger on an AR, I thought "That's odd." My very next trip to the range, a Prvi 175gr .308 primer popped into my LAR-8s trigger group. Very frustrating!
I also had one of those primers pop and get into my gas key. That took awhile to trace out.
It's a strange phenomena but it happens, and it happens randomly. It's nearly impossible to induce intentionally as a demonstration so some people just plain won't believe. ~Karl
I got a primer star thingy under a trigger assembly too, took several hours to figure that one out. This looks like a cool upgrade.
I have had this happen twice. Cases were my own Federal reloads. I learned after this was a problem with Federal cases used for reloads when they get near the hot end.
Thanks for a new video from gun PBS.
With support from viewers like you.
I just got my ke arms trigger. I think it’s odd how no one has mentioned how it feels. Like no other. The reset reminds me more of an electric button rather then a mechanical trigger. It’s an amazing trigger and damn is it fast
I just sat through a 12+ minute video entirely about an AR 15 fire control group, and I loved it. I am looking to build my own AR sometime relatively soon, and these videos are really encouraging me more and more to just do it. Great job Karl. Keep up the great content.
So did you build it? If not now's the time
Just used my new KE arms slt-1 today for the first time and WOW. It’s the only trigger i will use from now on. The reset is phenomenal. It feels like no other trigger. When I first installed it and dry-fired a few times i was convinced that i had done something wrong or i had a defective trigger - because it just feels so different. But no there was nothing wrong, i just ran 120 rounds of cheap tula steel case and 60 rounds of various left over 556 & 223 i had been saving up in a baggie from random range trips. Zero problems or issues and just idk what to say. Absolutely phenomenal. Outstanding. I love gheisle but for the money this trigger is hard to beat
It's hard to believe the WWSD is 6 years old now. I really love the work InRange did for this.
Thank you!
it appears that we are hugging the KE Arms website to death right now. Good job Karl and Ian.
If you thought it was bad 3 years ago... lol
They're so swamped now that there's up to a 6 week shipping delay lol. They can't complain about going out of business anytime soon!
this is such an awesome series! it's cool to see some actually new AR tech instead of the same old rehashed parts and furniture, I love your guys channels so keep up the good work!
Has this trigger undergone drop safe testing?
really enjoyed this video. very informative. loved the graphics explaining the trigger group.
Thank you so much for this series. I finally have my rifles (one for me, one for my wife) and have been holding off on many upgrades. Thanks to this series I feel I have a much deeper wealth of information than I had before. This has allowed me to feel confident in the choices I have already made and narrowed down the potential choices I will be making.
I’m in a similar boat and used these videos as a guide too. Everything is running great so far
All in all, this is probably your best video to date, Karl. Thanks.
I'm so-so on the safety being engagable hammer up or down. During 'mortaring' it makes sense. However, I store/transport my AR chamber empty, hammer down, mag in (to seal the biggest hole in the receiver) and hammer down.
That way, I can quickly determine if the piece is empty. (obviously, Rule 1 is always in play...)
If I can't flip the safety 'ON', then I know the hammer is down on an empty chamber.
I carry an MPX EDC in my backpack and it's nice to verify chamber condition by checking the safety lever. No need to take the piece out of the bag and do a chamber check. (not exactly a low profile maneuver... ;) )
I love these videos. Keep them up.
I'm much more of a service rifle "clone" guy and not into the competition or aftermarket stuff too often but this is a great series. Keep it up guys!
That's the interesting thing about this series, they're trying to put together hypothetical new service rifles. They're just using aftermarket parts to do it, because they don't have their own machine shops. ;)
Would love to see a couple spent primers tossed in the lower to see what happens. Great build, love the series.
Sounds like a great choice. 4.5 lb single stage- 1911 shooters will love it. I learned on a 2 stage and have very little experience with single stage. The box seems like a good idea. I have heard of popped primers but never experienced it. Can see where it would be a cast iron PITA if it got wedged under something. Yrs ago when my Bushy was new i let someobe try it at a club match using his handloads. Got off 1 or 2 rounds then nothing. Double feed. When we yanked the mag, powder came spilling out. Either the rounds had very little crimp or were not crimped for a semi. Primers were also too deep cuz a round failed to fire. Cycling it yanked the case away from the bullet i guess. It was very odd. So is powder spilling out of the mag well
As someone who has only held, never fired, an AR type of rifle (it was an AR-10 shooting 7.62 NATO), I'm finding this series downright educational. You explain everything and while you use the official terminology, you don't get so technical that someone unfamiliar can't understand it. You also talk about your reasons for the components over others, pros and cons, its really valuable. I may have to buy one, wheel me and my wheelchair out to the range and go shooting. (I"m particularly interested in 300 blackout and suppressed.) Keep going !
P.s. I have heard that "short stroke piston" operation is the way to go (as compared to "Direct Impingement") for low recoil and less gas back in your face from the suppressor.....can anyone speak to that?
.
Enjoyed, this thank you.
This series is gery cool.:D Especially for a guy with no guns like me, teaches me a ton of interesting stuff.:D
Very interesting. I'm planning out a suppressor-optimized pistol/PDW SBR build. Depending on how your testing holds up, I may end up incorporating this trigger into my build.
It would be interesting to send this rifle to someone like say, Garandthumb just to see how it fairs in the field. It’s really cool to see this series though, really interesting to see more then the usual builds.
7 Stages of this match that we used these rifles in isn't sufficient field testing for you?
ruclips.net/user/results?search_query=inrangetv+tiger+valley
My mistake, I didn't see that series yet.
Love this content
Just got my KE Arms SLT-1 installed on my AR15 and man it's nice. Good deal too since I got it with an ambi safety as a combo for about $180 with shipping from Ballistic Deals.
I will say, from an initial stand point, it really makes the action smooth and almost like I don't have a hammer in the gun when I pull the charging handle. Can't wait to try it out on the range. The trigger is insanely light, well light since I've been shooting what felt like a really heavy 7 or 7.5 milspec trigger that was from Palmetto State Armory. lol
Cool, glad to hear you like it so far! We both think the SLT1 is fantastic. ~Karl
Something I noticed damn near a year later is that on this trigger is that the standard safety lever could not be made to also select the fire mode. Using this type of trigger would force a secondary fire mode selector located above the trigger, that would allow for the disconnecter to keep hold of the sear.
The big issue with the 9mm SMG variants was egging out the pin holes in the lower receiver for the trigger group. However, I wonder how much of this was due to the one-time popularity of rewelding demilitarized M16, XM16E1, and M16A1 lower receivers. John Norrell wrote up the procedure for Firepower magazine back in the 1980s. At the time, the receivers were only being chopped once. The trick was sorting out two pieces big enough that you'd be able to match them up after reswaging, straightening, and cleaning up the cleft. However, I can't imagine that all of this work combined with the heat of the welding was all that healthy for the metallurgy of the 6061 (early) and 7075 (late) aluminum. Norrell also noted that you had to watch for some of the earliest receivers, which had thinner sides than later production.
I do like the ability to engage the safety. I've always found that annoying on the AR.
GEEEEWACKS!! Love em.
I never understood why it was made so that you can't put the safety on unless it's cocked. But it doesn't bug me enough to change out my Geissele g2s trigger which is really sweet. I polished all the contact surfaces before installing it, but I didn't remove a bunch of material to where it changes the geometry I just shined and smoothed things up so it's more like the higher end version that they sell.
Geissele also includes stronger pins than the normal mil spec pins.
I'd like to watch this trigger torture and endurance tested.
The cassette triggers like the SLT-1 do not have the same hammer spring strength. This can cause some ammo not to ignite as consistently. Could cause accuracy issues. My SLT-1 will not reliably set off .22LR at all.
Great video. Very professional. best I've seen. let me guess: you were an auctioneer in your previous job. :) it would have helped me understand the action of the trigger if you put vector arrows in the animation to show which way the parts were moving.
Nope, I've never been an auctioneer. ~Karl
I like the closed system as well as the ability to engage the saftey with the hammer down. I wonder if the SLT-1 trigger would work in the Sig MPX rifle? I would seem that this trigger would solve the problem of hammer wear on the trigger bridge when using an after market trigger parts. That is to say, this trigger would appear to eliminate the need for Sig's trigger bridge to absorb excess hammer energy.
i got more than a dozen complete GI trigger groups for like $20 total many years back, therefore stock works for me. not being able to switch the safety whenever i wanted has always bothered me however.
Mud test? Mud test.
The Sig P320 uses a similar concept to disconnect the trigger as well.
When will you be covering the bayonet for this rifle? I think sword bayonets have a lot of modern applications :)
Hahaha,
Do you work at the Pentagon ?
Hahaha
Gun is okay I guess, but it needs an electrified chainsaw bayonet.
the trigger engineer is the "saucier" of the firearm mfg industry.
so cool
I have had at least 2 primers pop out and jam up my trigger assembly. Both times were with Federal XM193. I am very interested in this trigger. Thank Karl
Lots of people say this doesn't happen, until it happens to them. :) ~Karl
Huh... maybe I should consider that trigger group. I feel being able to have the safety on, whether the hammer is back or not, is a good feature.
I've heard that enclosed trigger systems can gum up and have issues when shooting suppressed as carbon can build up within the housing. Just one of those internet rumors I've heard.
Do you know anything about all of that?
He would probably tell you to just keep your rifle clean.
How are you going to clean the inside of an enclosed trigger group?
I have never seen carbon fouling from a suppressor that was so bad that it caused a FCG issue. That's pretty extreme abuse. I don't know the answer to this beyond that I think this enclosure would be less likely to allow carbon into the FCG but I can't answer this thoroughly. ~Karl
Maybe I'm a weirdo on this, but I like knowing it can only go on "safe" when it's charged.
I get that.
Thanks. I always like technical product descriptions and the reasoning behind the choice. i do have to say that a lot of the parts on this trigger seem very delicate (aka small) and just from looking at the drawings, I do feel some concerns regarding wear or jamming up if crap does get into the system (aka falling into a muddy river or gunk build up over time). I will be curious how this system will treat you over the long run.
Low strain yes, but I feel wear of those teena tiny hooks would be an issue. I remember before Geissele hit the scene and set the standards, that it was common acceptance that not a single non spec trigger would make it through a 2 day carbine course. (This is only like 7 years ago) I heard of a lot of Timney triggers back then breaking and NM Rock River triggers wearing into bland single stage triggers. While I like match triggers and have a bunch of them I still refer to MilSpec ones for life and liberty guns. Just my 2 cents.
I'm loving this super nerdy stuff with the WWSD project. I'm looking to start building an AR15 for myself here fairly soon, so I'm waiting with baited breath to see what else you've put in the guns, and how well they perform!
Also, not putting irons on the guns as backup is definitely a viable choice, no matter what the naysayers want to spout. I've got a few friends in the army and in the marines, and when I asked them what they trained on, they all said "M16s with ACOGs." Seems the military doesn't really value training soldiers on irons for basic anymore, so why bother putting them on general service rifles?
Cool Animations
Hey Karl, with your Computer related background have you considered a piece on the crossover of IT and firearms at the Defcon shoot that's hosted by Deviant Ollam before the Defcon conference each year?
We did actually provide a presentation last year. ~Karl
Does this use a full power hammer spring? I know that companies tend to use reduced power springs to get a better trigger pull, but this could have issues with say harder military primers.
Looks like some tiny parts that could break.
9:10 With an interest in mechanisms, how would a military design make that full-auto? Or has it been designed from the standpoint that no perps can make it full-auto?
Having it so that the secondary sear doesn't disconnect seems to be the most direct way I can see in this design, but the likely ergonomics for a selector would be ass.
How does the KE compare with hiperfire?
Hiperfire also has that weird look where the hammer seems to be floating in nowhere.
Do you have a video on what you used to build that gun you are holding? THis is the first video of yours that I have watched. Saw it on TFB.
+clloydhi Not everything yet. We have a playlist and it's growing with content about the WWSD project. We'll be deep diving into each component over time with specific videos. ~Karl
ruclips.net/p/PLj9u4Ts2NpEupLyK709wC9t5uU_JssBop
What do you guys think of the semi-/fullauto selection, that is used in the Steyr StG77?
What size hardware did you use to retain the fire control group?
On the new FCG the main seer(Blue) seems to have very small contact with the hammer. Since only the corner engages the hammer, is their any chance of it being a breakpoint or "wear quickly" point? Thanks and great new series
Wait....looking at what the trigger was designed to do and watching the clip of the trigger running again I'm pretty sure that the answer to my question is simply "No"
With that design would the more wear and tear on the single contact surface the hammer has be a problem? Considering now it has to slap back into the sear on it's way forward, I expect that little surface on the hammer to get beat up more.
What is your guy's thoughts on the fostech echo trigger? Would it have a place in the modern stoner ar15?
No.
This sounds like a good match for the Sig MPX. Am I wrong?
Ok so... where's the link?
Is it a K E Arms trigger? If so which one? Doesn't seem to be on their website.
Doesn't seem to be for sale anywhere.
What happened?
www.kearms.com/triggers.aspx
what trigger pins did you use i like them
Stoner certainly would have improved and evolved a basic Mid- 1950s design. Look at all the improvements that POF has done to their rifles. Still a lot of growth left in this classic Stoner design.
These are actually more affordable than many other high quality triggers too
Could yall do a video on 10 guns that have chaged the world
What do think about having a counter recoiling weight to dampen the recoil without using a muzzle break that is annoying
what is the barrel and handguard length?
Looks like a 14.5" and a 13" handguard.
Is that trigger end-user serviceable? Or does it have to be sent back in the rare event that something really small gets jammed up in there?
There is no need to wonder what Stoner would do. Before his death in the 90's he was hired by Knights Armament as a consultant and they came up with serval improvements to the AR platform and incorporated them into their SR-25(AR-10) and the SR-15(AR-15). These improvements include an enhanced bolt design that has larger locking lugs that are rounded instead of square to increase its strength. A larger cam pin. A custom length gas tube that is slightly longer than mid length. Free floating barrel, 2 stage match trigger, and an ambi lower
Nutz4Gunz45 a lot has changed since the 90's. Just look at how far sights have come. And ssshhhhh, don't spoil the fun.
Crazy indeed......
TheJfdksl the Cav Arms lower had NOTHING to do with the AWB... They were at their height of popularly in 07/08.. They were shut down in 2010 for manufacturing in a facility that was not listed on their FFL... Nothing at all to do with the AWB sunset. .. Also Stoner's approach was to use light weight space age material to lighten the weight of the weapon platform. . These were not even available for Stoner to use in the early 90s...
So you are saying its Expensive
El Jericho uhh yes he would.
i am currently doing a ar biuld/ my first and wieght is a concern but not a priority. to me it looks heavier then a mil spec trigger cause all that extra metal covering, is this comparable to mil spec trigger or drop on trigger wieght?
would yall consider publishing a comprehensive parts list for your guns?
Yes, once we've done a full deep dive on each part. That'll be the last video in the series. ~Karl
Karl can you drop this in any AR and does the caliber of the rifle matter?
while all your video makes sense to me, but i have to disagree with you on the safety lever. i totally understand the need to have your gun in safe even just as an airsofter because even if our guns can't hurt people the way firearms can, you can still take someone's eye out if he doesn't wear eye protection, this is why around "safe zones" having your gun safe is severely enforced.
in the standard configuration, i feel like that you can't put the safety on if the hammer is "down" (as opposed to "cocked") is a safety feature because if you can put the safety on, that means that your hammer is in the ready position and that the bolt may be closed on a live round and if you're going to store the gun, then you may want to check if it's clear (as live rounds left in the chamber is one of the main reason in firearm incidents), and clear the gun if otherwise.
the contrary as if you can't physically put the lever on safe, it means that your hammer is "down" and that there a considerably less chance that your gun may be closed on a live round (next to none, as risk zero doesn't exist in this world).
In the animation, the trigger is released at the same time as the hammer is coming forward, so the primary sear just jumps into position. I can't tell what the secondary sear is doing. I know how disconnectors work, just this animation is not making sense.
I was thinking the same thing, I watched the animation over and over and the function wasnt making much sense. The animation needs to delay the reset of the trigger in order to get the full functional view. I dont think many people release the trigger before the hammer cycles....
I really wish I knew what gas block and bcg that gun is running
Anyone know if the KE Trigger is safe to use in an AR10 (Aero Lower)? It looks to be a light hammer so it may be damaged by that fat bolt.
Forgive me if this has been asked already but, as the videos are being made, are they made together then uploaded separately or did you space the making of each video? Also, along those line, are we seeing post tested parts or are we seeing it as it goes?
Still being made, there's a lot to do. ~Karl
Admittedly, I don't know much about triggers mechanically speaking, but I was wondering something. With the spring inside the housing pressing against the trigger bar, is there any need for it to extend outside of the housing?
Ah, I see. Thanks!
How hard are spare parts for this fire control group to obtain? Hard or easy?
It's an entirely contained unit, you'd just replace the whole thing. ~K
Are you going to MUD test these?
Probably not. We have 3 AR15 mud test videos already. I think we've made our point. ~Karl
Yes but how field serviceable is it?
I have to disagree on the safety being able to be engaged regardless of the weapons state. Not being able to engage to safety is a sure sign the AR hasn't been racked. Being able to put the weapon on safe for mortaring it seems like a small benefit for that loss. But that's just my opinion, love this series so far.
Karl! you need to get testing because I plan on stealing Ian and your rifle ideas and combining key parts, but I wanna see how they do.
also how do you feel about fixed vs adjustable stock setup?
Adjustable stocks are nice but not essential. They, like everything, bring improvements and detriments. ~Karl
InRangeTV so am I right to assume you will go over this in the future?
Yes.
InRangeTV good, thanks Karl!
how can you tell if it is cocked?
Mud! Test! Mud! Test! Mud! Test! :)
....hammer spring is backwards on that trigger group i think.
Just out of curiosity, what was the thought process in choosing the 3 prong flash hider? The military decided to go with the bird cage flash hider not long after the adoption of the M16, so why has Karl decided to revert to the old way?
ohhhh that's right, I forgot about the 14.5" barrel he had on there.
dang NFA. Great reply!
I might be wrong, but I think Ian's longer-barreled "DMR" has a removable bird cage-style flash hider?
Would Stoner stick with a 5.56 as it's generally considered ineffective at range hence the need for DMRs?
@Juan Sanchez And modern with Optics, So why stick with a cartridge that is only effective out to 200-300m when the enemy can engage at >500m
Stoner actually never liked 5.56 and preferred .308. This is also the real reason he didn't care for forward assists; the AR-10/SR-25 carrier has enough mass and a heavy enough spring to not worry about it (which is why the G3 and FAL get away with not having them, vs every modern intermediate caliber rifle having them other than the tavor).
With the reduced shock to the trigger system. would this trigger make a lightened bolt carrier group less problematic?
Similar problem, similar solution. ~Karl
InRangeTV
Good job,,, keep up the good work. .
Is there an official definition of a " MATCH GRADE TRIGGER"???
Thanks. .
No, not really. Generally speaking it's a two or, more commonly, single stage trigger that is adjustable between 2.5 - 5lbs of pull weight. ~Karl
InRangeTV
Thank you for the reply, ,, I have a set trigger on my model 70,,
and I was confused. ..
my bad,,,
thanks again...
how can i know if my bolt carrier is too fast?
Local Forearm "too fast" as in "bolt bounce"? It's not an issue for semiauto. If you mean "smashing the back of the buffer into the back of the tube", try using a heavier buffer and see if it still operates reliably.
This is definitely what Stoner would do because the original AR-10 selector can be operated when the hammer is cocked or uncocked
So basically they just used a trigger bar (green part) like any standard pistol.
I like that approach, maybe next time also include a de-cocker and externally accessible hammer and it'll be perfect.
Can you mortar an AR15?
I wonder how much it would cost to make this rifle.
I think at $200 a trigger, some thought has to be given to an acceptable cost. The suggested trigger is more than 1/3 the cost of a complete, working Anderson AR. Admittedly the Anderson's have a less than stellar finish, and sometimes some internal roughness leaves the factory, but for the most part they work okay. From my perspective anytime you speak of replacing $20 worth of steel parts with a $200 assembly we start talking about building a race gun. Is a drop in hammer/trigger/sear box with a light trigger pull desirable? Absolutely. Should getting one add another 1/3 to the cost of the rifle with the biggest advantage being touted in case a primer or a pebble gets under your trigger? To me, no. A previously owned (used) $40 Timney off Ebay works just fine thanks. :)
It's probably the second most important part of the gun behind the barrel. Worth every penny, even if it costs you $200+
I hear you, but I think the most important part is the shooter. $180 buys a fair amount of practice ammunition. Noting also that continual actual firing and friction smooths out a lot of initially rough engagement surfaces. (Of course some 800 - 2,000 grit automotive sand paper does that too.) Yes, sure if you have 10,000 rounds of AR usage and can repeatedly put 5 out of 5 shots into a playing card at 100 yards with a mil spec rifle, a better trigger would be a good thought. But for a beginner putting their first AR together? I am not at all convinced a high dollar trigger is what they need. This of course raises a question I know nothing about. Does anyone make a factory match rifle that comes with an alternative target trigger as a factory option?
Ken ibn Anak you can just build a rifle and put the money where you want to. You can still have a cheap rifle with a good trigger. PSA runs deals all the time.
Long Range good to know.
Price gripers: You should just spend all the money you could save on ammo!
Also price gripers: *Owns a lot of guns they don't shoot*
j/k, but anyways they aren't doing a series saying what they think everyone should buy, they're trying to find the best parts.
I just got an add for "Birth of the dragon" when I opened this video. Seems like RUclips is taking their own revenue here.
Those catches look really small, any wear concerns that would render the trigger inoperable?
Extensively for years? I thought this was a new product. They're rearranging the catches and the trigger group is nothing like the M4 or M16 trigger groups that I have used, installed, and ran while with the USNavy. Who is running these that has had such use?
you either didn't pay very much attention to this video or you aren't familiar with trigger groups in general. The geometry of this assembly is vastly different from virtually all other trigger groups. The fact that is missing the disconnector would tell basically anyone who is familiar with chigger geometry that something big is going on.
if you were to take the disconnect her out of a regular trigger group or one made by virtually any other aftermarket company it would not perform, at all. the hammer has a completely different geometry as well. All the linkages on this device at best look like they have a .065" engagement face whereas a regular (or top tier aftermarket) trigger group has and engagement of at least 0.185". that means there's a significant amount West material where all of the linkages engage each other and anywhere at all would be significant.
That's why I asked the question if this trigger, which is vastly different than anything that's been around since Eugene designed the rifle, would suffer any longevity issues.
Because it is a smaller surface. For a given pressure the smaller the surface the higher the pressure will be. The higher the pressure the higher the wear. Add to that the fact that the engagement in this trigger group is so small it doesn't have much room to wear since the catches are so much smaller.
I'm sure they're using quality steel but everything wears and with drastically less material it stands to reason that could very well result in a shorter service life.
Why the insistence on using an M16 stock instead of an adjustable one?
Watch the latest qna. He explained that it's the only way to provide sufficient strength with a polymer lower.
I think they explained the reason why in the first video of this series.
Will this System work on Select Fire M-4's or M16a1😎
can that trigger group be set for 3 shot fire?
No, it's semi auto. ~K
Thank You