Bolt Won't Close/Pierced Primers

Here is a picture of what Alex is talking about.




The case on the left has a hole punched through the primer. It rarely happened to me, but there it is. One out of 500 (mostly Radway) cases checked. Perhaps the Federal case has softer primers than Radway.

I had the same thing happen in my rifle on Tuesday at the range. It was leaving a very high dimple on the primer cup. Knocked a hole right through one. Sending back my bolt in the AM to have them look it over. I also noticed when I turned the gas down to setting 2 or 3 the dimple was less apparent. Primers are CCI 400's.... I also noticed it wasn't doing it as bad when I shot LC factory ammo with a military primer.

P.S. The rifle shot some great groups!!!

Load data
50gr VMAX
CCI 200400 primer
26.5gr TAC powder
Guat 5.56 brass
Seated to max length for PMAG's

This is .2 grains under book because guat is a thicker brass which will increase pressure.








Sending my bolt in to Robarm cured my problems. I love this rifle!!! No more cleaning after every shoot like my AR15.

Here are mine from 03/11/08. I contacted Terra. I can't shoot on any setting less than 4. I guess all the gas is escaping out of the pierced primers

BTW- here's a picture of my bolt after I had just shot some Wolf (hence the red residue).



Now an AR bolt. I can see more of a chamfer there:

Fellas,

We don't have to be a mechanical engineer to figure out some OF THE COMMON PROBLEMS we encounter with our XCR's and other weapons. I believe EVERYONE who owns any gun should have some basic mechanical insight. To say that "I don't have it" means to me "I won't try" and "I don't care". These are the same folks who will also bring up that same question I always see/hear "Which is the best for the SHTF gun?" Well if indeed the S-H's-T-F I doubt posting our problems on the intraweb, if so accesible still at that time, will bring a quickly needed solution. Much less expecting courrier services to be up and running.

Folks, the XCR really hasn't got anything new that has't been around for at least 60 years as far as a basic design goes. There are no computer chips to mess around with unless of course somehow you managed to shove one in the XCR somehow. Plus I can't see how RA, or any other gun manufacturer, can make the XCR, or any other gun, more anti-armorer/pro-self repair any simpler. So accessing any part in order to remove and replace, repair, or adjust any simpler.

IF YOU SEE THAT YOU HAVE CRATERED OR PIERCED PRIMERS SEE DA STICKY.

IF YOU NOTICE THAT THE EJECTOR IS LOOSE SEE STICKY OR RETIGHTEN W/LOC-TITE.

IF YOU NOTICE THAT YOUR XCR ISN'T FIRING ALL TOO WELL, SHAKE THE THING, SEE WHERE IT IS RATTLING FROM AND EITHER TIGHTEN THAT OR FIND DA PART/GET ANOTHER AND REPLACE IT.

Ya'll will be amazed, if not astonished, that you can find the tools necessary to work on your XCR at Home Depot, Lowe's, ACE, TrueValue, Harbor Freight (eewww) or mom and pop hardware. You should at least have handy a 1/4" allen wrench for the barrel and a 5/8" open end for the old GB handy, like say in whatever case you carry your XCR along with a cleaning rod (not bore smake-that I just use for cleaning) and broken shell extractor for that once in a million chance a case head separates (not the gun's fault). Ya'll will also be amazed that the same hardware store may carry 90% of the bolts, screws, springs, and clips that are on your XCR. But I recommend to get them from RA because we are talking inexpensive parts here.

Most inportantly;

IF YOU DO EXPERIENCE A PROBLEM WITH YOUR XCR THAT CAN'T BE FIXED IN DA FIELD, CALL, E-MAIL, OR WRITE ROBINSON ARMS FIRST!

If it needs to be aired on open forum with da problem, at least give them a call 1st, THEN tell us about your experiences but don't be like this "It's a POS because I can't tighten a barrel bolt, but I'm a high speed operator with 8K post count" guy:

http://forum.saiga-12.com/index.php?showtopic=21172&pid=193152&st=0&#entry193152


Quote from: Saiga-12 Forum

QUOTE (Zebra @ Dec 4 2007, 05:03 AM)
not impressed with the HK 416. it looks like a piston driven AR as someone stated earlier. still got a hard on for the XCR from Robinson Armament.


QUOTE (Saigaczech @ Jan 13 2008, 03:31 AM)
Lose your hard-on for the XCR, had one and got rid of it in less then 6 months. The barrel requires "exact" torquing of the bolt that fixes it in place. That bolt comes loose easily and the whole barrel wiggles then. If you over tighten the bolt it damages the receiver. I had it come loose during a class, was stringing my groups all over the place at 100 meters and had all the instructors saying, "WTF?" as they know I rate master with a rifle(Master rating? Or was it masturbating? The guy leads one to belive he is a Marine or Army grunt. Neither rates "Master" in any FA qual course.). Another thumbs down is that you have to punch out the front pin if you need access into the receiver. Not very user friendly as it will not open as wide as you need for you to work on it. The trigger sucks too and is proprietary so you can't fix it. Just my $0.02 worth.

As to HKs, I am still partial to the P2000 or USP compact system with LEM trigger. Best DAO system on the market I think. I agree that they are way over priced, about as much as SIGs. I blame the media for the pricing, every bozo wants the gun used in "Rainbow Six", "Collateral" or "24" as ti will make them uber tactical. Most of them are trained with weekends playing Counterstrike or Halo and do not know which end the bullets come out of. Grrr. Not to mention, the HK Mk 23 is the only gun I held that made a Glock 21 feel ergonomically correct. The grips are just too big even for my lumberjack hands.

The HK civilian rifle designs suck and the cool ones are not available to civies. The HK AR mags are way over priced as well as their guns. I seem to do just fine with surplus mags for $11 each and a MagPul follower.

Oh well, the government likes them so they are blowing millions of our tax dollars buying their stuff. What can you do?



QUOTE (i303 @ Jan 26 2008, 10:02 PM)

Let me see if I got this staright, the XCR is a total POS that you don't recommend because the barrel retaining bolt came loose during a class? So just tightening it requires any special skill or tool other than a 1/4 inch allen wrench available at any hardware store, WalMart, and probably any other discount and grocery store?

My gas block screw came loose. You know what I did instead of selling it? I tightened it up.



QUOTE (Saigaczech @ Jan 27 2008, 04:08 AM)
Yes, it is a POS because a barrel coming loose during a real engagement is a big NO NO! Last I remembered I do not carry a 1/4" allen wrench in my tactical gear nor is it standard issue to any individual infantryman. If a rifle can have that sort of problem during a class, which is nice and peaceful compared to a SHTF scenario, it will fail you when you need it most. Unacceptable. Also just tightening it without the proper torque settings will mean it will either come loose again or that you damage the receiver ( I discussed this with the tech support at Robinson so it is straight dope from them). Neither is acceptable for a military class weapon (or one that is trying to be one). Something like that can get you killed if you rely on a gun like this. There are better gas piston guns out there.


QUOTE (i303)
So, as an individual infantryman, don't you also carry a cleaning kit and at times, other tools specific to certain weapons? As an 11B/0311 don't you carry a dental pick, a piece of metal hanger flatened at one end, or small screw driver, or a carbon scraper just for a M16/M4 inyour "tactical gear" in order to perform routine maitenance? So a 1/4 inch allen is all too much to carry? And I supposed as the high speed operator/infantryman that you are't you supposed to perform PCI's and PMCS? I also suppose any vehicle that gets a flat instantly becomes a POS because a tire change, or drive it on the rims if necessary, will be on order. Tell me more about what can get you killed in combat please. It's not always the weapons that need some headspace and timing.

First off the XCR hasn't been around 40+ years to work out it quirks yet. The g'vmt hasn't spent a dime to test/R&D this weapon. The XCR has been out less than 2 years. issues will come up just as issues still come up on current TO&E issued equipment. I've had two issues with my XCR and one was resolved in 30 seconds and the other was resolved in about 3 days only because that is how long it took to snail mail be an upgraded part b/c I have one of the first issued XCR's.

If anyone in my platoon, as in "an individual infantryman" would have come to me with that issue, a loose bolt, I'd have given that individual the 'You gotta be kidding me. Right?' look and I would have told that individual "You gotta be kidding me. Right?".

And, yes, I do know what can get you killed in combat. to include doing nothing. Pahleze, don't get all too hung up on my low post count. More shooty, less posty!





No gun is immune to "issues". Even well proven designs will have issues arise from time to time such as in QC at times falter.




#1) Gas block came loose. Noticed it at around 250 round count and still worked. Resolved: I just tightened it. No lock tite. As later posted by RA carbon will self lock tite it as I noticed that on a recent complete disasembly.


hi, i am new to the forum and this platform. i am interested in purchasing an xcr in 7.62 in a couple of months. i have a couple of other m4 type weapons and have had no issues with them, what knid of issues am i going to run into with this platform? with problem #1 listed above, if i clean the carbon after i shoot is the gas block going to come loose again or do i have to leave it dirty? it's nice not to have to clean but if i have the time i do, is this a problem?
i see alot of minor problems but they all add up, at what point (in rds fired) does the xcr become reliable? i have read some of the posts above and agree with some. but to have things go wrong regularly is kind of scary. before i buy i would like to know how reliable this weapon is going to be and if i will be sending parts back regularly. any help would be awesome.