Heavy-duty side-folding mechanism constructed from 4140 steel. Can be configured to right or left folding. Modular design can accommodate different butt plate attachments. Specifications for Midwest Industries Side Folder With Light Weight Stock: Manufacturer: Midwest Industries Gun Model: AR-15 Color: Black Weight: 15.9 oz Fabric/Material: Aluminum Condition: New Country of Origin: USA Gun Type: Rifle Features of Midwest Industries Mi Side Folder With Light Weight Stock Picatinny Full-length locking lug for maximum strength Solid positive lock up in both positions Steel clamp with large surface engagement Features a skeletonized modular body Includes 3 anti-rotation QD swivel sockets Includes aluminum minimalistic butt plate (MI-STAP-CSP) Adds 8.75 inches to firearm length in the open position Adds 0.75 inches to the firearm in the folded position Complete assembly weight: 15.9 oz. Steel parts are mag phosphate finished Package Contents: Midwest Industries Mi Side Folder With Light Weight Stock Picatinny This product is compatible with the following gun models: AR-15