Windham weaponry 7.62x39 AR mag issues

QuickDraw16

QuickDraw16

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Location
Burnaby
I bought a WW-762x39 earlier in the year. It is an impressive rifle... when it isn't having issues.

I've been using 10 round XCR mags with it and have been having some serious feeding issues.
The mags seem to be difficult to load fully (7 is tight) and I'm lucky if I can get two rounds down range without a FTfeed. The problems persist even if I only load the mags to 5.

I've taken the mags apart but couldn't see any reason why they wouldn't function.
Is there a right/wrong way to assemble the mags?
Should I just lube the heck out of everything (the rifle is normally lubed up, but I don't oil the mags.)

Has anyone had issues similar to these, if so what was the remedy?

I can't recall if I had the same issues with the five round mags, will need to check when I go shooting next.
 
I did this mod to the mags:
http://www.ar15.com/forums/t_3_121/..._to_try_this___7_62x39_mag_modification_.html
I do find the mags work best if only loaded to 8rds.
I have 2500rds down my WWx39 this summer and no issues except for some light primer strikes with the hard primers on surplus Czech x39 ammo. I put in a Hyperfire Trigger and that pretty much took care of the problem. Maybe 1% light primer strikes now.
A cheaper fix for light primer strikes may be to try a high power spring. I think Xeelee here reports good results with that.
 
I use the same mags, unmodified in my PSA. You make no mention of the ammo you are using. I have no trouble loading 10 rounds in my mags, and have no feeding issues with most ammo. Czech lacquered would not feed more than one or two without a jam, but Norinco steel is issue free.

In colder weather, you can sometimes have feeding issues if you are using a grease, which thickens and can increase the effort required to strip and chamber a round. This is where marginal buffer springs become apparent.
 
Unfortunate... My WW runs smooth with 10 rounds in my XCR Mags. I did install an "enhanced" x39 firing pin (slightly longer) and a heavier hammer spring to counter hard primers.

I do wipe the inside of my XCR mags with a VERY light coat of CLP once in awhile.
 
Phat Eagle said:
Unfortunate... My WW runs smooth with 10 rounds in my XCR Mags. I did install an "enhanced" x39 firing pin (slightly longer) and a heavier hammer spring to counter hard primers.

I do wipe the inside of my XCR mags with a VERY light coat of CLP once in awhile.
Click to expand...

Any idea where one could source the enhanced firing pin?
 
When fully loaded the ammo tends to tilt down at the front of the mag. The whole stack of rounds will tilt downward, which more often than not causes the round that's next in the queue to drive into the front of the mag.

I have modified one of the mags to lower the edge at the front of the mag, it works ok-ish...


 
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