Features Aluminum alloy construction Matte black finish Aggressive design, ideal for covering extended inner barrels 16mm positive thread is ideal for Tokyo Marui Mk23 non-blowback pistols, VFC HK45 GBB pistol, Cybergun FNX GBB pistols, and KWA/KSC Vector GBB SMG's Manufacturer: Angel Custom Specifications: Diameter: 35mm Length: 156mm Threads: 16mm positive Material: Aluminum Check out my page for other items of interest! I accept reasonable offers on most items, combine shipping when possible on multiple purchases, and ship within US only!