The Radian P365-XMACRO Backstrap and Magazine Well were designed together to give users a secure and improved grip on one of today’s most popular everyday-carry guns – the Sig Sauer P365. The installation of the Radian P365-XMACRO Backstrap and Magazine Well uses a precisely machined dovetail interface with a patent-pending ANGLE-LOK spring-loaded retention stud that locks the components in place – no screws to loosen or break.