The optics-ready Taurus GX4 is compatible with Shield RMSc, Holosun HS507k, Sightmark Mini Shot A-Spec M3, Hex Wasp GE5077-MIC-RET, Trijicon RMRcc (need adapter plate). Features a no-snag profile; lightweight design; reversible mag release; flat face, serrated trigger; visual loaded chamber indicator; easy take down pin for disassembly; magazine and grip cuts to aid in magazine stripping; signature indexing and recoil management pad. Includes two magazines.