I pickup up one of these at a pawn shop a couple of months ago in .40 that uses Glock mags. Shoots great. You can go through a lot of ammo with the Scheer 29 rd mags. Mine has the Kel-Tec scope mount on it. I'm going to replace the cheap 4x scope that is on it with a red dot. The Kel-Tec mount comes with a replacement forearm notched for the scope mount. The mount pivots to the left so it will still fold up.