AR pistol build issue

[jeff357sig]

Upper bought complete from PSA. First one returned would not eject or feed.
Caliber 7.62x39 10 ".
Lower is a Jugernaught tactical with KaK shockwave pistol brace.
2 mags are C-products, 1 is ASC.
Shooting hot Yugo ammo it works 90%, with a failure to strip a round here & there.
Shooting Fiocchi or PMC bronze will not strip the next round out of any of the 3 mags.

Under gassed? SPRING & BUFFER TO LIGHT OR TO HEAVY.
Has the MAGlock for cali.

Thanks for the help.

[ARDude]

[cpl_dan]

check the gas port hole in barrel ( either to big or small) and check the gas tube maybe not correct size for length of barrel first

[spyde12]

What direction is the casing ejecting 3-4 o clock?

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[jeff357sig]

3 o clock

[jeff357sig]

3 o clock with the yugo hot & 4 o clock with the Fiocchi

[spyde12]

I don't know...

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[kalibeltfeeder]

California doesn't like illegal pistols.... If your in the state your s*** won't work..
Take it to Nevada and check back then,.

[wpage]

Give it a good cleaning and try different ammo

[jeff357sig]

Thanks

[spyde12]

BTW...are the mags identical? I've heard hexmags have issues compared to pmags

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[Bladewurk]

make sure it has plenty of gas AND extraction/ejection is good, by loading one and making sure it locks back on firing the single round 100% of the time..

Then cut feedramps into your mags with a dremel tool so it will feed 100% of the time when you release the bolt with bolt catch.

Then testfire again and report back...

[jeff357sig]

Thanks, mags are c-products , 1 asc. Both have seen the dremel after the range. Found an old USA pinned 20 that looks more like an AK mag. Next range day 2 weeks out. Thanks for all the info.