The ST45 Short Throw Ambidextrous Safety Selector is set to fire at 45 degrees instead of the usual 90 degrees, so you're ready for action with a quick flick of your thumb. The ST45 Selector is incredibly smooth and has a super-crisp lock-up, and fits standard AR-15 and AR-10 platforms that have the correct "FIRE" markings on the receiver. Fits standard AR-15 and AR-10 platforms with the correct "FIRE" markings at 45 degrees Set to fire at 45 degrees instead of the standard 90 degrees Aluminum levers, steel core Incredibly smooth action, crisp lock-up Made in USA Backed by a Lifetime Manufacturer's Warranty Order today!