B5 Systems Modular Platform Stock is a Coyote Bown composite folding buttstock with steel hardware, attaching via a 1913 Picatinny mount. Features an integral left-side folding steel hinge, 2 1/4 collapsible length of pull adjustment, and an adjustable spring-assist cheekpiece adding 1/2 of height. Includes ambidextrous fixed and limited-rotation QD sling mounts and a cushioned non-slip buttpad. Length 8.06, height 4.67. Weighs 16.80 oz. Safety note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.