I've shot a few XCR-L and one -M model, none of them were what I would consider accurate but they were all reliable. The only one I had issues with I believe was due to the owner not knowing how to assemble it correctly, the gas system pretty much just fell apart while we were messing around with it, after I put it back together it worked fine the rest of the afternoon. I'm not sure what happened or how he assembled it but it wasn't the fault of the gun anyway.
None of them are capable of 1 moa and until I see some actual proof where someone shows some targets showing 10 or more shots in a row I don't care if people say it's a 1 moa gun or not, it is not. One lucky group a day does not make a rifle capable of 1 moa.
The XCR-M I shot was a friends rifle and it was a heavy barrel model, with handloads he was able to get it down to about 1.5-2 moa consistently if you shot slow and didn't let the barrel get warm, if you let the barrel get warm the shots are all over the place. This tells me they are supplied from factory with a cheap barrel that is not properly stress relieved and that added to the poor (from an accuracy standpoint) barrel retention design adds up to a rifle capable of consistently producing groups of 1.5-2 moa when using handloads or premium ammo and taking your time between shots.
This is not a bad thing though, the rifle was designed to be a battle rifle not a sniper rifle. It does what it was designed to do quite well and now that they've ditched the silly quadrail forend it's a much better balanced rifle. The rifle is more than accurate enough for hunting deer or coyotes at less than 300 yards. It is not a good rifle if your intended use is sitting at a table making holes in paper though, you will be frustrated with either the large groups or how slowly you have to shoot in order to shrink those groups.
I've been watching the XCR since it was only an announcement, I waited to purchase when they were released then couldn't bring myself to buy one with all the early issues, as they evolved I was tempted again but ended up buying other non restricted semi's and just shooting XCR's owned by friends and waiting for RA to get it right, now that they seem to have gotten it right (other than in the accuracy dept) I still pass by them because my ACR is in my opinion a better rifle in pretty much every way. For my black rifle shooting when I want something bigger than what my ACR or AR180B have to offer I have a Modern Hunter in 6.5 Creedmoor and an M305 that will shoot tighter groups than an XCR-M, my M305 is a full custom with Krieger barrel so I'm not saying that a $600 M305 will shoot better than an XCR-M.
If you want a semi auto battle style rifle with accuracy potential there are better choices.
If you like sitting at a table shooting holes in paper you'd be far better off spending $1500 on a nice bolt action and having a rifle capable of sub moa.
