Weight 15.2oz / 431g – Technology Readiness TR Level 9 Fully developed in production. – Bolt Velocity Up to ±4% change from base dependent on system. – Coating Black Nitride QPQ – Caliber 5.56 .223 17 HMR 5.7 22 LR 5.45 – Mounts Direct thread 1/2 x 28 (QD Hub compatible) – Barrel Length No restrictions – Durability Passes 6 cycles of the SOCOM Reliability Stress Test. (1 cycle=8×30 round magazines) – Maintenance Detailed cleaning should be performed every 2500 rounds. – Materials 3D-Printed Grade 5 Titanium Core; 17-4 Heat Treated Stainless Steel Housing