B&T USA B&T, APC9K PRO, Semi-automatic, Pistol, 9MM, 4.3 Threaded Barrel, Anodized Finish, Black, 30 Rounds, 1 Magazine, Telescopic Brace Adapter BT-361765-02 The APC9 PRO features functional updates that include dual auto-folding, non-reciprocating charging handles, improved lower receiver ergonomics, a replaceable pistol grip, and M-LOK accessory slots. Glock and SIG SAUER compatible lower receiver groups are also available. The APC9K ships as a pistol. Multiple stock options are available for purchase separately.