Strike Industries' Strike Selector Switch is a patent pending modular safety selector that was designed to be intuitive to use for safe firing manipulations. The toggle action allows the user to quickly engage the safety when moving positions without altering the firing grip. Note: Will NOT fit .308 pattern lower receivers with shelf (DPMS, Bushmaster), ATI Omni Hybrid (all calibers), Seekins Precision SP 223 Gen 2, or F-1 Firearms Receivers, without modification to receiver or selector switch.