XCR 10 round 308 pistol mags in Canada 25.48USD

Keller said:
I ordered two and they do not work in my Stag 10, won't stay locked in.

If I slap them in real hard they will catch, but as soon as the bolt carrier moves they fall out. Also, tilting the mag to one side while inserted will cause it to fall out.

Pretty disappointed, going to see if there's anything I can do to modify it to work.
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Same issue here for the two I've received.
 
You guys having issues ..... do you have a standard issue stag-10 mag release?
I have 2 stag 10 builds going. The CPD xcr-m mags work in one but not the other until I installed an ambi mag release.
Seems some of the stag-10 factory bolt releases don't have enough meat on them to engage the mags fully.
They work flawlessly with an ambi release though.
 
kilo3niner said:
Same issue here for the two I've received.
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We have found on the odd Stag the mag catch is a couple thou larger, everything else we have tried them on is dilemma free. If you use a small file and file the sides of the mag catch on the magazine problem solved.
 
IRUNGUNS said:
We have found on the odd Stag the mag catch is a couple thou larger, everything else we have tried them on is dilemma free. If you use a small file and file the sides of the mag catch on the magazine problem solved.
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Appreciate the help but that doesn't seem to be what was going on with mine. Explaining here for anyone else interested.

I have the standard stag 10 mag release.

It seems like ( for me ) the mags were too narrow for the magwell and the catch wasn't in them deep enough. When you wiggled them from side to side and pulled they would easily fall back out like Keller was describing.

I took IRUNGUNS advice and filed the sides. No change. I believe the mag catch was already going deep enough to begin with since other mags I've tried have worked without issues and filing the SIDES didn't allow the mag catch to insert further.

What DID work was when I bent the top and bottom of the mag catch hole out slightly which took up some of the slack in the magwell. Now both mags feel more solid with less wiggle and will absolutely not pull back out without releasing them.

Just needed a little bit more purchase on the mag catch.
 
Just did the same.

The upper edge of the mag catch cutout in the mag needed bending out slightly. They all work fine now.

P.
 
This is the side you want to file a bit: rob-xcrmag30810_1_.jpg

Conversely, you can remove the magazine catch/release and see if it does need some filing. The procedure to remove it is the same as any other AR rifle. This video shows how to do it: https://www.youtube.com/watch?v=NiF4LcDz1j0

Some rifles need to have the magazine inserted on an open bolt. The angle of the feed lips are slightly different than other magazines.


kilo3niner said:
Appreciate the help but that doesn't seem to be what was going on with mine. Explaining here for anyone else interested.

I have the standard stag 10 mag release.

It seems like ( for me ) the mags were too narrow for the magwell and the catch wasn't in them deep enough. When you wiggled them from side to side and pulled they would easily fall back out like Keller was describing.

I took IRUNGUNS advice and filed the sides. No change. I believe the mag catch was already going deep enough to begin with since other mags I've tried have worked without issues and filing the SIDES didn't allow the mag catch to insert further.

What DID work was when I bent the top and bottom of the mag catch hole out slightly which took up some of the slack in the magwell. Now both mags feel more solid with less wiggle and will absolutely not pull back out without releasing them.

Just needed a little bit more purchase on the mag catch.
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SSG69 said:
What about 10 round pistol PMAGs?

These XCR mags sit too low in the Stag and the BCL that I owed, and when the BCG comes forward to pick up the round it hits the trunnion face just below the feed ramps and leaves little dimples.

https://www.canadiangunnutz.com/forum/showthread.php/1787991-7-62-308-XCR-mags-compatability-issues-in-AR-308-Stag-10-BCL-102-ect

These work fine in am AR-10. Never had an issue with my ArmaLite.
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If magpul did manufacture 10rd pistol pmags for 556 and 308, those would FLY OFF the shelves at mach 20. Or might not even reach any shelves. lol

You'd probably see people hoarding them and selling them for 100$ on the EE. Closest thing that happened were the few hexamags in 10/30 bodies that some got, before these were 'banned'.
 
So these lock up in a Stag 10 just fine but the BCG will not scoop up a round when there are 3 or less rounds in the magazine. Any ideas? Is the spring underpowered?
 
Canadian-Sniper said:
So these lock up in a Stag 10 just fine but the BCG will not scoop up a round when there are 3 or less rounds in the magazine. Any ideas? Is the spring underpowered?
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Define "scoop up"?

If the bcg doesn't clear the mag/rounds after a shot, its the lack of gas.

If the bcg does clear and doesn't have enough oomph to rack a round in, then it's either the (too weak) spring, or there's something catching on a moving part (friction), or it's the actual magazine spring that's not pushing the rounds all the way up in the mag.

Since you're saying this happens when 3 rounds are left in the magazine, I'm leaning towards the magazine being the issue.

do you have an another mag (or pmag) laying around to try it?
 
The mag is definitely the issue. Pmags work just fine. Im just trying to figure out a way to make these mags function properly. When there are 3 rounds or less in the mag, the bcg just sort of pushes them down and scrapes the top round. Almost seems to be seated too low in the mag well.
 
Canadian-Sniper said:
The mag is definitely the issue. Pmags work just fine. Im just trying to figure out a way to make these mags function properly. When there are 3 rounds or less in the mag, the bcg just sort of pushes them down and scrapes the top round. Almost seems to be seated too low in the mag well.
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Dang, I've got 5 of those mags also!

I'll be trying them over the weekend and report my findings. It might be mag-to-mag specific.
 
I should have updated my posts a long time ago.

Filing the hole as IRUNGUNS suggested completely fixed the problem for me. The two that I have work flawlessly in my Stag 10 now.
 
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