Fortis Manufacturing SLS FIFTY Safety Selector 50 and 90 Degree ODG ODG. While most AR safety selectors in the market today rely on standard socket/torx screws the Fortis SS FIFTY was engineered with patent pending RidgeKey locking mechanism. This system allows the levers to secure itself onto the selector core with a solid point of contact and thus eliminating any weak points in the system. selector core is coated in black nitride giving you a smoother surface and superior resistance to wear. Never worry about the possibility of yscrew backing out breaking or snapping with the Fortis SS FIFTY. Specifications for Fortis Manufacturing SLS FIFTY Safety Selectors: Manufacturer: Fortis Manufacturing Finish: Nitride Gun Make: AR Platform Gun Type: Rifle Gun Model: AR-15 Fabric/Material: 6061-T6 Aluminum/4140 Steel Hand: Ambidextrous Condition: New Features of Fortis Manufacturing SLS FIFTY Safety Selectors Ambidextrous 6061 T6 Aluminum selector levers Cutout design to see the core 4140 Steel selector core coated in black nitride and optional as TiN Medium length for optimum performance Built in 50 and 90 degree options Robust RidgeKey locking mechanism with no visible screws Strategically placed serrations to offer maximum real estate for contact Package Contents: Fortis Manufacturing SLS FIFTY Safety Selectors What firearm models does the manufacturer say Fortis Manufacturing SLS FIFTY Safety Selectors is compatible with? The manufacturer suggests that Fortis Manufacturing SLS FIFTY Safety Selectors is compatible with AR-15Fortis Manufacturing SLS-50-ODG: SLS FIFTY Safety Selector 50 and 90 Degree ODG ODG