Chambered in 9 mm, the APC9K PRO is a more compact version of the B&T APC9 PRO line. It uses a hydraulic buffer system to reduced felt recoil and muzzle rise when fired. The design also incorporates dual folding, non-reciprocating, ambidextrous charging handles on both sides of the upper receiver just beneath the top Picatinny rail. Other features include a bolt catch and release on both sides of the lower receiver, M4 / AR-15 style interchangeable grip and M-LOK compatible slots on the short forend.
The Magazine release and safety selector on the APC9K PRO are also ambidextrous and easy to reach from both sides. There is also a folding stock incorporated into the design for stability that folds right up against the back of the receivers to keep the folded length as short as possible. The APC9K PRO can be equipped to accept either B&T, SIG P320 or Glock compatible 9 mm magazines by swapping out the non-serialized lower receiver group.
The small size of the APC9K PRO is ideal for specialized service in the United States Air Force where room is limited inside the tight confines of aircraft and vehicle crew spaces. The U.S.A.F. is the second branch in the U.S. military to adopt the APC9K PRO, after the U.S. Army adopted it last year. The U.S.A.F. plans to acquire roughly 350 to 1000 of these new compact submachine guns to likely phase out the aging H&K MP5 in use by personal security details.