The Magpul® Enhanced Rubber Butt-Pad, 0.70" is an optional replacement butt pad for the CTR® and MOE® Carbine Mil-Spec stocks as well as the original UBR®, all STR®, ACS-L™ and ACS™ stocks. It is designed for enhanced shoulder purchase and offers improved recoil reduction with its thicker, vented construction. The Enhanced Rubber Butt-Pad can also be installed on Commercial-Spec MOE / CTR stocks, but may prohibit use of the fully collapsed position due to the extended, slanted back of most Commercial-Spec receiver extensions. All mounting hardware included. Made in the USA. NOTE: Not compatible with MOE Fixed Carbine Stock.