Maxim Defense CQB Gen 6 Collapsible Stock for AR-15 is a 4-position adjustable buttstock designed for MILSPEC AR-15 lowers. Housing is machined from 7075 aluminum alloy with a MILSPEC anodized Flat Dark Earth finish. Features one-handed pull-to-deploy operation (no buttons), knurled collapse lever, extended cheek weld, textured butt plate, and anti-rotational ambidextrous built-in QD sling mounts. Adds 5.375 to firearm length when collapsed, 10 when fully extended. Weighs 18.59 oz. Compatible with any MILSPEC bolt carrier group, plus Maxim CQB Series or JP Silent Capture Spring buffer/spring systems. Do not modify BCG for compatibility. Safety note: Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.