The military-chosen AAC MG-SD is a single unit solution for reducing the signature of 5.56mm and 7.62mm light machine guns. Designed from the ground-up to handle the unrelenting heat and abrasive blasting of sustained burst firing, the AAC MG-SD features a rugged monolithic core of heat treated Inconel® 718. The core fully circumferentially welded to the Inconel® outer tube and 316 stainless steel fast attach mount. The MG-SD couples to a BLACKOUT® flash hider using the evolutionary new rock-solid 90 tooth Ratchet Taper Mount™. Reducing the sound, flash, and dust signature of belt-fed light machine guns saves lives in combat and preserves the hearing of the shooter and nearby support personnel.