The Magpul Enhanced Rubber Butt-Pad, 0.70" is an optional replacement butt pad for the CTRA(R) and MOEA(R) Mil-Spec stocks as well as all STRA(R), ACS-L(TM), ACS(TM) and UBRA(R) stocks. It is designed for enhanced shoulder purchase as well as offering slightly 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 fully collapsed position due the extended, slanted back of most commercial-spec receiver extensions. All mounting hardware included.