Like new, Advanced Armament Corp.(AAC) Blackout 51T Flash Hider with sound suppressor (silencer) threads. Quickly screw your sound suppressor right onto this hider without having to remove it first. This came on a new rifle I bought which was test fired only by the builder before I bought it and installed a different flash hider, so this flash hider is like brand new. 5/8x24 threads for 7.62 (.308) rifles. The BLACKOUT® flash suppressor is the most efficient design available. The proprietary features eliminate muzzle flash, even on CQB-length barrels. The BLACKOUT® is inherently stronger and more impact resistant than four prong designs, while not being subject to the rapid erosion of closed-ended units. A high strength corrosion-resistant aerospace alloy, and ultra-hard Nitride finish provide the highest level of durability. Military tested and selected. Weight:4.3 oz. Length: 2 1/2". Length added: 1.875". Finish: Nitride. Mount: Ratchet Mount. Willing to accept credit card payment thru discreet Paypal transaction. Retails for $99.