UPDATE: 360+ rounds of mixed XM193, IMI, and Wolf thru it on Sunday with zero defects. Very accurate at 30yds on paper, didn't get to shoot at longer range yet. I had the bolt internals and external lubed w/ white lithium grease for the initial shoot, same as I've done w/ all my other black rifles. After cleanup, it'll be getting my brew of Mobil 1 5W-30 engine oil + moly additive from now on.
It's a total mutt gun:
Model-1 XM177-type upper w/ fake flash hider that works surprisingly well, no visible muzzle blast even w/ the XM193.
Rock River Arms bolt carrier group, Stag lower w/ DPMS parts kit and RRA shorty stock.
I broke in the barrel by shooting 10rds, swabbing the bore w/ CLP, repeat for 10 iterations...then blast away. Unscientific methodology but no evidence it hurts anything.
Pics came out really bad b/c of sun glare, I'll try to tweak tonight and post something.
Quoted: I just bought an XM177 upper from Model 1 and my impression is great thus far.
The black finish matches my Stag lower perfectly, no blemishes or dings, and the takedown and pivot pins are a nice snug fit. Very solid upper/lower fitment. I patch-cleaned the bore and chamber, no imperfections I can see internally. My only wish was that it came in a 1/7 twist barrel.
(I live in a ban state for now, and options for fake flash hiders that can be machined open later when I move to the USA are limited)
I haven't fired it yet as I'm waiting for my RRA bolt carrier group to arrive, will post a range report when it happens. I expect it to be loud, but not as obnoxious as a compensator/brake on a longer barrel.
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