The Tyrant Designs NexGen 45/90 is an ambidextrous safety selector for mil-spec AR-15 and AR-10 lowers. It installs in a standard safety pocket and can be configured for either a 45-degree or a 90-degree throw, so you can set the rotation to match your shooting style. Both ambi levers are the same length for a consistent feel on either side of the rifle. Features: Ambidextrous design for AR-15 and AR-10 platforms Configurable 45-degree or 90-degree throw Identical-length levers on both sides 6061 aluminum levers with rubber overmold over a steel core Gold lever finish Weighs roughly 0.32 oz; made in the USA Fits standard mil-spec AR lower receivers. Verify your lower uses a mil-spec safety pocket before installation.