The GEMTECH Blast Jacket is our newest accessory that mounts on ALL existing GEMTECH Quickmounts. The Blast Jacket throws the muzzle blast forward away from other shooters on the line and prevents the huge dust cloud we all experience when shooting in the prone. We made this out of pure titanium so it only weighs 3.5oz. and the stainless spring is capable of a million compressions built to last. It keeps short guns short at 2.55 overall and is a great addition to anyone's load out. - CALIBER: FITS AND FUNCTIONS ON RIFLES THAT ARE COMPATIBLE WITH EITHER 7.62 OR 5.56 BI-LOCK QM (308 AND BELOW) - ATTACHMENT: GEMTECH BI-LOCK SYSTEM - LENGTH: 2.55 (64.8MM) - DIAMETER: 1.5 (38MM) - WEIGHT: 3.6 OUNCES (102G) - MATERIALS: 6AL-4V TITANIUM CONSTRUCTION WITH A286 OR STAINLESS STEEL SPRING - FINISH: CERAKOTE BLACK - ACCURACY: NO POI SHIFT - SOUND SUPPRESSION (MIL-STD 1474D): 0 dB REDUCTION - SERVICE LIFE: GREATER THAN 25000 ROUNDS WITH PROPER MAINTENANCE OF QUICK MOUNT DEVICE