The B&T KH9 is a Limited Production Swiss-made firearm derived from the SITES Spectre M4. It features an STGW90/SG550 grip. This configuration includes a suppressor that attaches to traditionally threading over 4.3" barrel. Chambered in 9mm, the B&T KH9-SD can utilize traditional B&T polymer magazines, but also the highly-regarded Suomi coffin mags with the additional adapter. The KH9 has no external safety. It features instead a decocking lever which therefore equates to a SA/DA trigger system. Imported in limited numbers, the KH9-SD is a must-have for the premium collector or firearms enthusiast.