No More Rivets for Pmags!

[Marshall]

How is it done exactly?

For the PMAGs a polymer block replaces the base plate retainer and extends up inside of the spring to limit the travel of the follower. You can remove the base plate and block just as you normally would and the follower and spring can then be completely removed.

Pistol mags are just a polymer block epoxied to the underside of the follower or to the top of the base plate retainer, depending on the type of magazine.