I have the G19 frame Sub2K just because the G19 is my carry pistol. The ability to drop a carbine in my laptop case that takes the same mags was the selling point. Break it in with 124gr ammo for the first 500. They are sensitive to underpowered ammo. With good ammo I have had zero problems with mine and Keltec has a lifetime warranty.. I put a rail on mine and added a red-dot sight. 6 of the G18 mags in a carrier and I have a travel pack in case of riots in Liberty City again.