Compatible with firearms that include 1913 rail adaptor. Shipped for rifle use also compatible with Gear Head Works tailhook for arm brace use. Cosmetic arm brace plug sold separately to ensure the back beam is smooth. Adjustable polymer cheek piece for comfortable use with all users. Adjustable butt pad for increased usability with plate carriers or heavy gear. 5 position locking beam with textured button for quick adjustment. Heavy-duty side-folding mechanism constructed from 4140 heat treated steel. Reversable design for left-handed shooters. Full-length locking lug for maximum strength. Solid positive lock up in both positions. Steel clamp with large surface engagement. Can be configured to right or left folding. Features 3 QD sling attachments. Curved adjustable top surface for a comfortable cheek weld. Adds 8.0 to overall firearm length. Adds 0.75 to the length of the firearm in the folded position. Constructed of high strength polymer aluminum and steel components. Weight: 1lb 5oz. Made in the USA