The AAC Advanced Armament 556-SD is a fast attach silencer for 5.56mm rifles. With a design based on an earlier version of the best selling M4-2000, the compact and lightweight 556-SD offers consumers feature-rich content and excellent value. The 556-SD uses the tried and true 51T Ratchet Mount fast-attach system that enables users to install or remove the silencer in seconds. The baffle core of the 556-SD features 100% Inconel 718 and full circumferential fusion welding to provide a lifetime of use under the most demanding conditions. Includes 51T 1/2×28 Blackout Flash Hider Mount.
Caliber: 5.56 NATO
Weight: 18 oz
Sound Reduction: 31dB*
Mount: 51T Ratchet Mount; 51T 1/2×28 Blackout Flash Hider Mount