Breek-LOK 3QD Compatible Muzzle Devices The Breek-LOK 3QD QD Suppressor Attachment system sets the standard for quick-detach mounts, delivering unmatched speed and ease of use. Its streamlined profile integrates seamlessly with your firearm, enhancing both aesthetics and performance. The Breek-LOK 3QD Echo Single-Port Muzzle Brake significantly reduces recoil and muzzle rise through 90deg horizontal blast-vectoring ports, enabling rapid, accurate follow-up shots. Six small holes create a jet effect further controlling muzzle rise and movement for added stability. Less blowback improves shooter comfort, critical for competitive or defensive scenarios. Engineered for compliance, the Echo is designed to be pinned & welded on 14.5" barrels to meet the 16" Federal minimum length requirement and avoid SBR classification. Its sleek, compact design complements any build-ideal for SBRs or pistol-caliber carbines-while maintaining a clean, refined appearance.