Energetic Armament PEAK 30, 30 Caliber Suppressor, 11.9 Ounces, 6.4 Length, 1.55 Diameter, US Stainless Steel Construction, 1.375x24 Mount Threads, Nitride Finish, Black, Includes 5/8-24 Direct Thread Mount EA10 Energetic Armament's Peak line offers weight efficient silencers for those shooters that don't require the extreme temperature and cartridge energy ratings of Energetic Armament's highly regarded VOX and ARX lines, but want the weight, durability, modularity and efficiency engineered into every Energetic Armament suppressor.