Weight 3.9oz / 111g - Coating C-Series Cerakote Matte Black - Mounts Ships with 1/2x28 direct thread. - Barrel Length No restrictions. - Maintenance Detailed cleaning should be performed every 1000 rounds. - Durability Full-auto rated. - Caliber 22 LR 22 Magnum 5.7 17 HMR - Technology Readiness TR Level 9 Fully developed in production.