B&T APC9 Pro 9mm 7″ Sig P320 Lower

The APC9 PRO SIG Lower utilizes a 7″ barrel and features ambidextrous controls. The SIG PRO lower will accept SIG P320/M17 9mm magazines, AR/M4 type pistol grips and features a 7″ barrel with tri-lug installed.

PRO 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.