Magpul Enhanced Rubber Butt-Pad, 0.70". The Magpul Enhanced Rubber Butt-Pad, 0.70" is an optional replacement butt pad for the CTR and MOE Mil-Spec stocks as well as all STR, ACS-L, ACS and UBR stocks. It is designed for enhanced shoulder purchase as well as offering 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.