Armaspec SMB-9 Gen 3 9mm AR-9 Captured Sound Mitigation Buffer

The Armaspec SMB-9 Gen 3 is a captured single-stage Sound Mitigation Buffer purpose-built for 9mm Luger AR-9 platforms. Designed as a drop-in replacement for a standard buffer and spring combination, the SMB-9 uses a captured design that keeps the buffer spring from rubbing against the inner wall of the buffer tube, resulting in noticeably smoother and quieter operation.

This Gen 3 version weighs in at 9.88 oz as a complete system with an equivalent weight of 6.9 oz. The captured configuration eliminates the typical spring-and-buffer rattle common to direct-blowback 9mm AR builds, making it a popular upgrade for PCC shooters looking to tame the operating noise of their rifles and pistol-caliber carbines.

Drop-in installation requires no modifications to your existing lower receiver or buffer tube. The SMB-9 is made in the USA and built to Armaspec's quality standards for reliable, long-lasting service in your 9mm AR.