The Velos LBP K uses a low back-pressure technology to reduce overall blowback while maintaining impressive sound suppression. The Velos LBP K is constructed of a 3D printed inconel 625 core fully welded to 17-4 stainless steel front and rear modules, making this product unlike anything else on the market. It is also full-auto rated and the most durable suppressor SilencerCo has ever made. Ships with an Internal Charlie Flash Hider Front Cap, a Charlie ASR mount, ASR Flash Hider in 1/2 x 28, a spanner wrench, and a Charlie tool. Brand SilencerCo Category Suppressors Series K Model Velos LBP Caliber 5.56 NATO Color Black Material Inconel 625 Length 4.76" Diameter 1.73" Thread Pattern 1 / 2"x28 Weight 12.40 oz Accessories Charlie & ASR