The new for 2024 APC300SD chambered in .300 BLK is a specialized tool for critical missions requiring whisper-quiet subsonic performance out to 150 meters and, with a magazine change, the ability to deliver supersonic rounds on target to 300 meters and beyond. Equipped with an integrated, state-of-the-art, over-the-barrel (reflex) sound suppressor, a fully functioning quick-change M-LOK-compatible SD handguard and our recoil-absorbing hydraulic buffer system, the APC300SD is a high-tech, low-visibility assault rifle that blends the ultra-low sound signature of our SPR300 PRO with our APC assault rifle platform to create a truly modern .300 BLK system.