Midwest Industries MIALPHAM4BSF: Heavy-duty side-folding mechanism constructed from 4140 steel. 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. Modular design can accommodate different stock attachments. 2 QD Sling attachments. Compatible with Milspec diameter stocks. Curved top to mitigate wobble from skeletonized beam. Adds 7.0\" to overall firearm length. Adds 0.75\"\" to the firearm in the folded position. Complete assembly weight: 11.6 oz. Steel parts are mag phosphate finished