Midwest Industries MITRISF: Heavy-duty side-folding mechanism constructed from 4140 heat treated steel. Full-length locking lug for maximum strength. Solid positive lock up in both positions, steel clamp with large surface engagement. Features 5 QD sling attachments. Stock is made from Hard Coat Anodized 6061 Aluminum. Cheek piece and butt pad made by Midwest Industries, polymer cheek piece and rubber butt pad for better comfort. Adds 9.25 to overall firearm length, adds 0.75 to the length of the firearm in the folded position. Steel parts are mag phosphate finished