B&T USA APC9K PRO, Semi-automatic, 9MM, 4.3 Barrel, Polymer Frame, Anodized Finish, Tan, 33 Rounds, 1 Magazine, Glock Magazine Compatible BT-36045-G-CT The APC PRO series brings a new level of performance and adaptability to the APC platform. All models feature a dual auto-folding, non-reciprocating charging handle, improved lower receiver ergonomics including a side positioned bolt hold open/release, removable M4 compatible grips, and Magpul M-Lok accessory slots. This version of the APC9 Pro takes Glock pattern pistol magazines.