Energetic Armament KEY VOX K2, 30 Caliber Suppressor, 10.4 Ounces, 4.9 Length, 1.55 Diameter, Welded Core, Heat Treated C300 Nickel-Cobalt Alloy, 5/8-24 Direct Thread, Compatible with Other Mounting Hardware, Nitride Finish, Black EA11 The Vox K2 is a next generation 'kurtz' compact silencer for shooters that require a hard use, high temperature silencer that is light and compact. Engineering efficiency is at the core of Energetic Armament's design and development philosophy and this new silencer is testament to that. At 10.4" and 4.9" long, the K2 improves weight efficiency (dB/oz) by 60% at the muzzle and 25% at the ear over the legacy Vox K in testing performed on a Mk18 rifle. Where a compact and high performance silencer is needed, the Vox K2 yields 54% greater length efficiency (dB/in.) at the muzzle and 20% greater efficiency at the shooters ear.