The Midwest Side Folder with Buffer Tube Adaptor is a heavy-duty side-folding mechanism that attaches via a Picatinny rail with a full-length locking lug for maximum strength. Constructed from 4140 steel and given a mag phosphate finish. The side folder can be configured to fold to the right or left and can accommodate different stock via a Mil-Spec buffer tube. Adds 2.5" to firearm length in the open position and 0.75" in the folded position. Weight is 8.4 oz. 100% made in the USA.