The RISE Rev 535 Slide-and-Snap AR Trigger represents a next-generation approach to AR trigger upgrades with silver/red coloring and revolutionary installation technology that saves time while delivering exceptional performance.RISE Rev 535 AR Trigger System60-second installation with built-in pins - no tools screws or threadlocker requiredIncludes both flat and curved blade faces for shooter preferenceCompatible with mil-spec lowersAnti-walk and anti-rotation security built-inCrisp no take-up performance for improved accuracy and shot speedPerfect for shooters seeking rapid installation and reliable performance enhancement for their AR platform spending less time installing and more time shooting.