Re: Colt AR15 20 Rd Mag Follower Question
The Aluminum followers in the 20rnd GI/Colt mags are EXCELLENT and generally run without any problems! When I buy 20rnd mags from gunshows, etc., the Al. followers is just one of the things I look for.
I have also modified Magpul followers for 20rnd mags with broken followers in the past and that works well. I don't recall the precise measurement I used when cutting down the legs on the Magpul followers, but I'll try to inspect one of my modified mags later this evening and report back.