B&T APC9K PRO, Semi-automatic, 9MM, 4.5" Threaded Barrel (5.5" with Tri-Lug Installed), Polymer Frame, Black Finish, 33Rd, 1 Magazine, Glock Magazine Compatible, Tri-Lug Adapter Included BT-36045-G

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(R) M-Lok(R) accessory slots.