B&T USA APC9 PRO, Semi-automatic, Pistol, 9MM, 6.8 Barrel, Tri-Lug, Anodized Finish, Black, 30 Rounds, 1 Magazine BT-36039 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.