mrvmax wrote:I have a 300 Blackout AR platform pistol which is a great firearm and I also built an AR platform 9mm rifle that uses Glock magazines and that also has serves its purpose. At this point I am waiting for New Frontier Armory to come out with 10mm a Glock mag lowers so I can have a 10mm rifle that will use the same mags as my carry gun (Glock 29). I think 10mm will be a great compromise and with a 16" barrel I should get some extra velocity along with a .40 cal Bullet.
Quarter Circle 10 makes a lower for .45 or 10mm Glock mags