Putting together a new frontier ar9 lower and I guess the standard bolt catch won't be doing the trick. It's a glock compatable model, -'d I've seen the long finger bolt catches for what I'm assuming are colt mags. Is my only option to get an upper with the last shot hold back thing? I thought about drilling out the standard bolt catch and making a catch that will work with the glock mags.
Thanks!
Thanks!
