Blackout Defense 45/90 Safety Selector AR-15 Multi-lever Black. Its modular design allows the user to install it as a standard 90 or 45 throw simply by removing the detent pressure and rotating the drum 180 inside the lower receiver. The drum is precision-turned from stress-proof steel and then nitrided for a smooth black finish. The levers feature a stylish design with a strong visual indicator of the safety selection and are CNC machined from aerospace-grade 7075 aluminum. Installation is easy and functionality is smooth. Specifications for Blackout Defense AR-15 45/90 Safety Selector: Manufacturer: Blackout Defense Gun Make: AR Platform Gun Type: Rifle Gun Model: AR-15 Fabric/Material: 7075 Aluminum Features of Blackout Defense AR-15 45/90 Safety Selector Drum turned from stress-proof steel and black nitrided for a lifetime of use Levers machined from aerospace-grade 7075 aluminum and hard coat black anodized Compatible with most semi-automatic AR15 and AR10/SR25-pattern rifles Easy installation design allows operator to switch to 45 or 90 degrees without removing the drum from the receiver - simply loosen the grip reduce spring pressure behind the detent and rotate the selector to the desired position Package Contents: Blackout Defense AR-15 45/90 Safety Selector 2 t-10 screws 1 safety detent 1 spring What firearm models does the manufacturer say Blackout Defense AR-15 45/90 Safety Selector is compatible with? The manufacturer suggests that Blackout Defense AR-15 45/90 Safety Selector is compatible with AR-15Blackout Defense SAFETY-15-BLK-45: 45/90 Safety Selector AR-15 Multi-lever Black