SilencerCo Velos Rifle Suppressor, 5.56MM/300WIN, 6.4 Long, 174 SS and Inconel 625 Construction, Matte Finish, Black, Includes Internal Charlie Flash Hider Front Cap, Charlie ASR Mount, ASR Muzzle Device, Spanner Wrench, and a Charlie Tool SU5419 The Velos LBP uses a low back-pressure technology to reduce overall blowback while maintaining impressive sound suppression. The Velos LBP 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.