HK, Magazine, 9MM, 15 Rounds, Fits USP, Polymer, Black, Red Follower Rifle It also comes with an

It also comes with an additional Low Profile Pic Rail to mount your Pro to most any MILSPEC Pic rail

which activates the unit with a normal firing grip

With solid adjustments for length of pull and cheek piece height via aluminum detent knobs

Bullets open instantly on contact

HK, Magazine, 9MM, 15 Rounds, Fits USP, Polymer, Black, Red Follower Rifle It also comes with anHeckler & Koch Factory magazines are made to H&K specifications and tolerances using high quality materials that provide perfect fit, durability and reliability. Expect these magazines to function reliably under the toughest conditions when it matters most. Features : 15 Round Capacity Polymer Body Construction Polymer Base Plate Steel Spring Red Follower UPC 642230266728 Manufacturer HK Manufacturer Part # 50248609 Type Magazine