Made a new ar 15 product a few nights ago.

[ar15barrels]

Umm.. Maybe you should read OP's post

I can't help that the OP used the wrong term, but that does not change what we are talking about...

[Predator]

Umm.. Maybe you should read OP's post

"My 9mm ar 15 takes thick mags and my standard mag release would cause my mags to fallout during firing. So I invented an adjustable mag release."

Anywho, in my experience with the convertible BB you can adjust the tension to the precise depth where the mag catch will clear the mag. Not sure if it's similar to OP's invention just wanted to throw it out there.

another guy trying to explain why Randall is wrong? Give it up man, Randall knows what he's talking about. Sometimes wrong terms are used by others, but you can take what Randall says to the bank!

[sseric75]

RRA and Spikes Tactical both make dedicated 9mm Mag Releases that will fix what you're experiencing.