The B&T APC9 K is a compact, high-performance 9mm submachine gun designed for tactical use, especially in tight environments. The “K” variant stands for "short" in German, making it even more compact than the standard APC9, while maintaining the same high level of performance. It features a non-reciprocating charging handle, ambidextrous controls, and a closed-bolt, blowback operating system that ensures accuracy and reliability. The APC9 series is known for its Swiss engineering and includes multiple variants to suit different needs. APC9 K is ultra-compact, with a 4.3" barrel and weighs around 5.5 lbs. It's designed for quick deployment and tactical operations where size and mobility are essential. APC9K Pro adds several enhancements, including a hydraulic buffer system that reduces felt recoil, improving control during rapid fire. It also features improved ergonomics, including a foldable stock and integrated Picatinny rails for attaching optics and accessories. APC9 K SD includes an integral suppressor, providing a quieter shooting experience without compromising the compactness of the APC9 K platform. It's particularly useful for law enforcement and military operations where sound suppression is critical. Each of these models supports a variety of magazine capacities, including 10, 20, and 30-round magazines, and is compatible with Glock-style magazines for increased versatility. The combination of these features makes the APC9 series a popular choice for tactical professionals