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I'm running Druamags 7.62x39 here is the link for the mags I'm running these https://ar15discounts.com/products/duramag-stainless-steel-28rd-7-62x39-magazine-black/What magazine are you using? I breezed though this and didnt see it mentioned.
I have a bca 16" 7.62x39 upper. C products defense Mags work for mine.
It would be interesting what it measured out to be and what size they enlarged it to.Well, the upper receiver is back en route to me. Here is the info I got from BCA.
TECH NOTES:
FAIL TO CYCLE DUE TO GAS PORT UNDERSIZED
ENLARGED THE GAS PORT TO THE RIGHT DIAMETER
TEST FIRED 10 ROUNDS WITHOUT ANY MALFUNCTIONS
GLOBAL ORDNANCE 7.62X39 122GR FMJ
Cool!!! maybe Hooyah DeepSea can turn his paperweight back into a functioning barrel.Well, the upper receiver is back en route to me. Here is the info I got from BCA.
TECH NOTES:
FAIL TO CYCLE DUE TO GAS PORT UNDERSIZED
ENLARGED THE GAS PORT TO THE RIGHT DIAMETER
TEST FIRED 10 ROUNDS WITHOUT ANY MALFUNCTIONS
GLOBAL ORDNANCE 7.62X39 122GR FMJ
It would make a world of difference if the mfg undersized the port in the first place. 7.62 would need an absolute "minimum" .088, but .091-.093 would be preferrable... and .125 wouldn't hurt my feelings to allow more ammo type options.Yeah, that would be cool. I'm not sure it would work, even with a larger gas port as I believe the 7.62x39 produces more gas than .300 blackout. But it is definately worth a try. I'll need to see the numbers.
Intesting. If not, you may have issues somewhere else in your gas system or in the chambering because folks are running 10.5" 7.62's successfully all over the place. I don't own one, but I've shot one myself.Just measured . . . , .120 and it didn't work. So, still a paperweight until I can think of something else.`
Yeah... Only in depth on pages 2, 3, and 1.I don't recall seeing elsewhere in the thread if you checked for leaks. Check the gas rings on your BCG and check to make sure the block itself isn't leaking.
Yea sorry for the late update. I took it to the range about the month ago and it ran as smooth as butter.Yeah... Only in depth on pages 2, 3, and 1.
@FastSmitty Did you get a chance to make smoke with that yet?
Extremely cool they took care of you like that so far out from the orginal purchase date. Glad it all played out in your favor!Yea sorry for the late update. I took it to the range about the month ago and it ran as smooth as butter.
I didn't read all the responses, just your post. My initial thought is feed ramp fwiw.Took out my fresh 7.62x39 ar build for test and I am having a failure to feed issue. Any suggestions? Video link is here
Thanks for any help.
TECH NOTES:I didn't read all the responses, just your post. My initial thought is feed ramp fw