I think it's caused by the spring rate.... you use 20rnd mags in NJ????? I would add a BG.... should solve your issue. LMK
OH!
It's not a pic of the release mech like ya'll wanted.... but I thought I'd show what's we are playing with.
No, It's not the final production mock up. So before someone bust my chops on a release date. I'm not saying just yet...... There are still patent issues to resolve so not all the features are shown in the pic.

standard Pmgas.. I am in America now..
I have to seriously pat you on the back.. the release and everything.. SO nice..
as long as the trunion holds I will LOVE this product..
I just noticed that the front lug was contacting one side of the mag by JUST a hair.. I would still lock in.. but there was contact.. so I shaved it a little more.. and now the mags go in even easier.. I wonder if that tension on the mag could cause issue?
if I need to add a BG I have no issue with that..
I am MORE than pleased with this product.. if you own a 223 saiga and an AR you SHOULD already have this thing!
and you get into some issues with pleasing everyone and all that.. people complain.. but you have been GREAT with me!
*first time ordered an S12 handguard.. had a last minute change of heart.. you took it back issued a FULL refund.. NO QUESTIONS ASKED..
*second order MSA adapter.. fast service... great product..
I would not hesitate to deal with you for anything.. keep working on putting out good shit... interested in any feedback about that last round issue.. if I go slow.. it is a non issue.. it only happened when I really bang off a bunch of rounds quickly... and it is ONLY the last round..