Back to the gun’s features — behind the muzzle, the AP53 utilizes a folding charging handle that’s pretty tough to utilize when the gun is in standard pistol configuration, due to the combination of a stiff recoil spring and strong spring that keeps it folded forward when not in use. On top of the receiver, the gun features correct recoil lugs for claw mounts, so be sure you order an optic mount designed for an HK53 and not an MP5, or you’ll be unable to mount it properly. These mags include the two amber polymer magazines that ship with the gun, a pair of Turkish 30-round steel mags, a 40-round Indonesian contract aluminum magazine, a German factory 25-round steel mag, a polymer 40-round Promag, and a 100-round BETA Drum from the now defunct company.