The Phase 5 90 Ambi Safety Selector is compatible with AR-15, AR-10, and LR-308 weapon platforms. The SAFE-90 features interchangeable components so it can be configured to favor left-handed or right-handed shooters. This drop-in part is fairly simply to install and features wide, CNC-machined 6061-T6 aluminum levers for ease of use. The center core is CNC'd from carbon steel and heat treated. The 90 throw matches the same 90-feel most shooters are used to. This kit includes 1 center core featuring a 90 throw, 1 long lever, 1 short lever, 2 Torx screws, and 1 Torx wrench for install. Ambidextrous safety selector featuring a standard 90 throw Customizable to favor left-handed or right-handed shooters Drop-in install CNC-machined aluminum levers CNC-machined, heat-treated carbon steel coreNote: A small drop of "Blue" thread locker is recommended during install to prevent walking fasteners.