The XCR as it comes from the factory is a good gun. However, nothing stays stock in my collection, so I integrated some of my own ideas and needs into the XCR’s core design. Most of the changes are not sanctioned or offered by Robinson Armament. Proceed at your own peril if you choose to replicate anything I’ve done
All that said, here is my SBR’ed XCR.
10.5" CL 1/9 HBAR with opened gas port, 6.8 gas dial to add more gas into the action, turned down under the rail to .670 to reduce weight. This is the shortest barrel length possible on the standard XCR upper.
14.5" CL 1/8 HBAR, turned down to .610 under the handguard to reduce weight
There is one additional modification I am unable to disclose at this time because it is experimental factory mod that Robarm doesn’t want public at this time.
The last thing I need is the new stock. As a bonus, I’d take a nitride treated 1/7 barrel too for rounding out my XCR. I might add a 9" PDW 6.8 upper when they get done.
Let me clarify. It was not a complete 6.8 gas block, it was a 6.8 adjustable gas valve, which has a slightly wider holes, allowing a touch more gas into the action
Yes safety wire is definitely a possibility and the way I would go if I felt them necessary. Washer tabs are also an alternative. I have had my XCR for almost 5 yeaars now and mine have never loostened and have never had any loctite added either. They have stayed so tight that I don’t even check them any more.
Whatever works for you,
MadDog
Sorry VB but I couldn’t resist showing off another SBR’d XCR.
I replaced the foam on the stock with plastic, which I regard as more comfortable and sanitary
I also had the take down tab modified. It is now flat with ridges on the face, making it a snag free design. Now it takes a bit more effort to get the gun open, which I think is a good thing
Here is the last pic I took before the recent mods. I will add an update pic later.
I really like what you’ve done, but why keep the A2 flashhiders? I’ve got a lot of catching up to do. I didn’t know that RA had put out a Gen2 single piece bolt catch.
Where did you get the 1:8 twist barrel from?
Also, do you have a part number for those Troy BUIS? There is no listing for XCR/416 sights.
I actually prefer the A2 over muzzle devices. I’ve tried a few, and have always gone back to the A2. I probably wont change unless I get some suppressor that mandates it.
I traded a 1/9 for a 1/8. The guy I traded with wanted to shoot some ultra light varmint grenades.
Troy part numbers are:
Front sight - P/N 1614001-19
Rear Sight - P/N 1614001-18
