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Discussion Starter · #1 ·
Well the tempature was approx 98 degrees, not one could in the sky, and I just could not resist the temptation.

I loaded up 100 rounds of Remington .223 puchased at walmart ($ 6.43 per box) in my brand new magpul P mags. I put on my magpul rail covers (thanks tzoid!) and threw it into the my range rifle bad. Just a side note, if you are looking for a rifle bag for the XCR I recommend the molle bag from cheaper then dirt. For about $43 bucks you get a really good bag. Someone on SIGFORUM recommended it to me and I could not be happier.

I hit the range. I realize that 100 rounds is barely breaking the ice but its all I can do for today. Sighting in my EOTECH at 50 yards was nothing but pure joy. Shooting in sequences of three I could keep all rounds within a quarter size. On one magazine the bolt would not lock back after the last round, not a huge concern but I kept notes for everyone and want to be detailed.

Ok so the problems.

out of 100 rounds I had FOUR failures. The failuers happen in this order.

1. Stove pipe

2. Stove pipe

3. Double feed

4. Stove pipe

All of these where quickly cleared. I 100 percent atribute this to the break in period and do not expect more problems after I get past 300 total rounds.

Sorry no pics this time. Once I get my BUIS and MIAD grip on I will post pics!
 

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I have yet to have any issues with mine, including during the break in period. I'm using American Eagle ammo.
 

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I had some issues with the first two magazines but discovered I was running it too dry. After a liberal application of oil on the bolt there were no further problems (other than dropping the wet bolt into the sand at the range and having to clean it again). I had gotten into a bad habit with my NP3 coated Sig pistols of not over oiling.

I also just got a number of the new Pmags with the covers and and waiting to hit the range to see how well they work.
 

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Discussion Starter · #4 ·
I probably should have brought more gun oil with me. Next time I am going to bring a bottle of hoppes and a case of ammo ;D
 

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Well hello guys ,i am a newb,over from the 1919A4 site. I just got my XCR ,from a dealer in Nevada. I love the ergononics of the rifle and the way it handles. I am still going through the break in period ,by the American stuff shoots well.I bought an XCR because i have two friends who bought the 556 ,both of them have had to send the rifles back and havent recived them for over a Mth. I went with the Magpul grips and rail covers ,troy sights ,and thinking about a euro tech.
 

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Guys, really ,i have an XCR and i like it as much as the rest of you do .But i hate to be a devils advocate about these rubber buffers.Look on Gun Broker at the amount of 770s and 630s that are for sale ? I have called on them and they would hang up when i asked them about the buffer ,so if you buy one ,you get his problem,NO Buffers. These are held in place by a tiny tit ,it breaks off your buffer is running around inside your rifle. I have been in contact with Curtis and told him i want spares ,i still havent heard back ,all are being used in production rifles. A lot of companys have tried this system ,only to abandon it because of this problem in the field ,and went with the spring system ,one was stoner.I am a retired Naval Weapons officer ,i have seen this numerous times.In the 80s ,H&K told me the same thing all who use this say ,we havent had any problems ,yeah on new rifles ,give them 10 years and a bunch of rounds and see what happens ,some failed in 4 years. I am not saying the XCR isnt a good rifle or the recoil system isnt a good one ,just keep spare buffers .My 770 is the best hunting rifle i ever owned ,as long as i could keep it going.
 

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Need to add ,later in devlopment H&K began useing counter sunk rivits to hold in the buffer on thier battle rifles ,this worked very well.
Part of the problems with the old style of buffer is the tits ,they are small barb like devices pushed into metal , thus if the buffer moves under stress they shear . Think about it. FNH got away from this and went to the ( rat tail ) on the bolts of thier LAR rifles ,this also was a disaster .now open an FN and you see the Stoner spring system.
 

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Open your gun ,look in the reciver at the rear ,it is the little rubber thing you see there in the back . Can you move it around with your finger? yes i thought so. In time being subjected to oil ,solvent ,and pounding it will shear or crack. Not that it is a bad system ,but when i was in the Navy ,,testing some rifles ,, this caused them to be rejected alone. Not that i care for them ,but i will say this about a Cetme ,they went to a little spring plunger . Pretty soon the H&K 93 (223 ) went to one built into the bolt. The 91 riveted its buffer in place ,It is the mounting tits that fail. I really hate to say this about a rifle i feel has a lot of promise . But i have been here and i have done this long ago ,and i saw a lot of really good rifles get canned over an AR because of this reason. And an XCR is light years ahead of an AR.
 
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