6ARC Knight’s LPR - Ep. 003 - Removal of the SR15 Mod 2 URX4 and Gas System
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- Опубликовано: 17 окт 2024
- In this episode we’re disassembling the 16” SR15 upper to get it ready for the 6ARC barrel. We talk about the tools and methods to remove the Knights SR15 Mod 2 gas system and the URX4 hand guard.
NOT SHOWN: in this video we were using our prototype SR15 Torque Rod in the barrel extension to remove the muzzle device and castle nut. The SR15 Torque Rod fits only the SR15 E3 barrel extension (does not fit SR25 or AR15 milspec extensions) and is available on our website in case you can't find a Knightstick.
SR15 Torque Rod: www.sunnshadow...
I bought the Mod 2 castle nut wrench from D. Wilson Manufacturing.
This video is Gold! No other video Ive found DUMB IT DOWN for the regular guy. As long as you have the right tools its not that hard but once again, the right tools. Thank you so much.
Aluminum black will fix any scratches on anodized aluminum. Most gun shops carry it. Nice to see this taken apart. Thanks for taking the time.
Very informative. I just received my new SR-15 CQB Mod 2 11.5" URG and was curious how the handguard comes off. I don't plan to disassemble my new upper but appreciated learning how it all goes together. Thank you!
Happy to help!
Cool mang! And yeah, it makes sense that the gas block and tube have to go in after the rail/barrel nut is torqued down. That channel that the gas tube passes through at the end of the rail before going into the receiver isn't stationary. :-)
That said, I'm starting to see some of the things that Knights does to make sure these things are tough and stay together. Couldn't understand the cost before, but that's changing.
I didn’t mention that specifically but that’s exactly the issue; the URX4 would interfere with the gas tube when trying to torque on or off.
TY for posting this!!! With that handy D Wilson castle nut wrench.... it can be done.
Sure thing! Was surprised that I didn’t find other vids during my search. From what I understand, there is actually a specific tool that Knights uses to pull the gas block (not my Allen wrench concept 😂) so there is a better way
Awesome video, it’s looks easier to do than dealing with taper pins
URX 4…..like building a ship in a bottle! :)
😂😂😂 great analogy
the castle nut wrench you bought from d. wilson mfg. - did you buy the narrow or wide version? i think i have the wide castle nut. it looks like it's a little more than .125, it looks like it's .178 (almost 3/16''). hard to get anything in there to measure. wilson has a wide available, no narrow in stock. also can't find the hanguard wrench anywhere though...
My tool from D. Wilson is marked as the "wide" version. I believe only the very early versions of the Mod 2 system had the narrow tooth design, so they are uncommon. I don't have a good source for the handguard wrench unfortunately, although if you can find a brand new rail, I believe they typically came with the wrench and a shim kit.
Spike's Tactical shims will work in 7.62 applications, I am not positive about 5.56 but it is worth looking into since the KAC shims are tough to find.
God bless you!
Thank you 😊
Thanks!!
was the handguard loctited on the receiver threads? Looks like it was some residue in the handguard threads?
The residue is anti-seize.
KAC specifies Loctite for URX 2/3/4 handguards and that is likely why the handguard gave him issues. I am not convinced the loctite is necessary, just a precaution.
Holy shit^^ I was expecting it to be different kind of difficult but god damn f@&$ field maintenance! Appreciate your video tho! Thanks!
Good video!
So can you switch out the handguard on an SR15 with any other handguard that has its own barrel nut?
Yes, the receiver will accept other standard AR rails with a barrel nut.
Thanks, interesting rifle. Seems like the standard AR hand guard and gas system is easer to maintain. I wonder why Knight's went with this nonstandard method?
After taking it apart and putting another one back together I don’t think it’s more complicated, but it is certainly a different process. The nut holding on the gas block was certainly easier to remove than taper pins!!
Why would you buy a KAC upper and basically remove everything that makes it KAC? Genuinely curious. Why not buy a stripped upper and rail, then add your barrel and gas system to it?
This is a totally fair question, and I have several reasons.
The main ones are 1) I’m still not sold on the whole 6ARC thing, and I can convert back to a 16” SR15 if I want 2) I now have a spare bolt and barrel for my other SR15s and 3) it was easier to find all the parts I needed together on an upper and make one purchase than to shop around, look for take-off receiver/charging handle/URX4.
@@sunandshadow_llc Gotcha. Does make sense to have a spare!
Are you going to have your new barrel threaded to use the KAC gas block and castle nut? I’m sure D wilson could do it.
I had considered this for sure. The MOD 2 gas system would be a cool feature on this gun. I opted not to do it as I’m not sure how 6ARC will perform for me yet and would like some time with the cartridge before I get into having custom work performed. Additionally, my Proof barrel is a rifle+1 system so I’d need to have a custom gas tube made to fit the MOD 2 gas block.
KA makes great products but given their proprietary parts, lack of availability, and ungodly prices, I would rather to stick to a good quality mil spec rifles like DD or BCM, plenty of parts with affordable prices !!
use dental picks to pull the gas block forward
I had to hit these little bit to loosen it up; I don't think it would pull right off. Maybe a little carbon build up there. Once it was loose I was able to push out easily. Picks could work for that but the initial hits would likely need a brass rod.
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