Armaspec ST45 45-Degree Short-Throw Ambi Safety Selector FDE

Description

The Armaspec ST45 is a short-throw, ambidextrous safety selector built for AR15 and AR10 lowers. Instead of the standard 90-degree rotation to go from safe to fire, the ST45 reaches the fire position at right around 45 degrees. That shorter arc means less thumb travel and a quicker, more natural motion when you need to get the gun ready. The action is smooth end to end, and it drops into a clean, positive lockup so you always know exactly where the lever sits without having to look.

What Sets the ST45 Apart

This one is built around a steel core mated to aluminum levers, so you get the durability where it counts and lighter, easy-to-reach paddles on the outside. Because it runs ambidextrous levers, righties and lefties both get a lever falling right under the thumb. The Flat Dark Earth finish is a Cerakote-style H-267 coat that matches a lot of popular FDE furniture and rails, so it blends into a tan build instead of standing out.

Fitting the ST45 to Your Lower

Here's the one thing to know before you order: the ST45 is designed for receivers that carry the correct 45-degree FIRE marking. It will physically fit any mil-spec lower, but you want your receiver's markings to line up with where the lever actually stops. If your lower only has standard 90-degree FIRE markings, Armaspec's FT90 is the selector meant for that job. Worth a quick look at your receiver before you buy.

Getting It Installed

Swapping it in is a straightforward job that replaces your factory selector. Armaspec includes the Torx screws and the correctly sized Torx key in the package, so you're not hunting for tools to finish the install. Just keep an eye on your detent and spring when you pull the grip, run a function check when you're done, and you're set. It's made in the USA and backed by Armaspec's lifetime warranty.