Use this stock if you have a shorty M1A similar to a SOCOM or Scout Squad model With all the shorter barrel. This stock is fabricated from a proprietary carbon fiber composite which makes the stock robust still light-weight. The magwell is relieved of material so journal adjustments are rapidly. https://lukasuhrai.webbuzzfeed.com/30045154/the-fact-about-sage-ebr-chassis-for-sale-that-no-one-is-suggesting