Odin Works OSCQSBLK Close Quarters Rifle Stock is a spring-loaded, close-quarters stock compatible with AR-15/M4, 5.56/.223 platforms. Made from 6061-T6 aluminum. When fully collapsed, adds just 5 to overall rifle length; deploys via button-operated quick spring system to 5 different length positions, ranging from 5 to 9. Features ambidextrous forward and rear QD sling mounts. Includes a compact buffer tube complete with buffer (3 oz) and spring. Overall weight: 23.3 oz. Safety note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.