I have a Glock 21 460 Rowland Conversion. This pistol fires flawlessly. It has a stainless slide, compensator and comes with 9 boxes of Underwood ammo that run $40/box. This thing is an absolute canon! 44 Maghnum power in a Glock. Watch the videos there is no comparison between this and 45acp. The price is a great deal! Can be converted back to 45acp with only a barrel and recoil spring. Transfer via Form 4473. No exceptions.