The B5 Systems Modular Platform Stock features an integral left-side folding steel hinge, adjustable length of pull, spring-assist cheekpiece, ambidextrous fixed and limited rotation quick disconnect sling mounts, and a nonslip buttpad. Attaches via 1913 Picatinny mount. Constructed of durable composite materials and steel hardware.Collapsible 2 1/4" Length of Pull AdjustmentAdjustable Spring Assist Cheekpiece Adds 1/2" of Height. (To open, pull back and push up. To close pull back and push down)Integral Left-Side Folding Steel HingeCushioned Non-slip ButtpadFixed Sling Mounts and Steel Anti-rotational QD MountsColor-Matched Steel HardwareAttaches via 1913 Picatinny MountMade in the USAWeight: 16.8 ozLength: 8.06 inWidth: 1.76 inHeight: 4.67 in