The B&T KH-9 is a limited-edition remake of the Italian SITES Spectre, inspired by founder Karl Brügger's appreciation for the original design. It features a unique linear hammer system and a DA/SA trigger with a decocker. Early prototypes used Suomi quad-stack magazines, while later production models were adapted to accept standard B&T APC9 magazines, though the Suomi compatibility can be retained.
This review of the SITES Spectre SMG highlights its fast rate of fire and controllability, particularly with the top-folding stock deployed. The 50-round quad-stack magazines are noted as difficult to load. A design flaw causes recoil to potentially dislodge the selector switch from the fire position. Shooting without the stock significantly reduces controllability, emphasizing its importance for effective use.
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