Use this stock if you have a shorty M1A just like a SOCOM or Scout Squad product With all the shorter barrel. This stock is manufactured from a proprietary carbon fiber composite that makes the stock solid still light-weight. The magwell is relieved of fabric so magazine variations are quick. https://erickfscpy.blogthisbiz.com/35689258/5-easy-facts-about-ebr-stock-m1a-described