B&T APC9K-G PRO 9mm 4.3" 1:10" 1/2x28 Bbl Tailhook-Ready Pistol, Glock Lower 

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 and brace options are available for purchase separately.