20 round magazine limiter - Ar15

20 round magazine limiter - Ar15 (10 and 7 round limiters) don't throw out your "NON-COMPLIANT to the illegal laws magazines add these limiters and reduce the round count that can be loaded in them. if you need it permanent rivet in place.

Disclaimer: This is remix from a very nicely done version for a pmag that can be found on grabcad.
Follower and Limiter for ...
by Thomas Fochler
https://grabcad.com/library/follower-and-limiter-for-pmags-5-56-1