Description
The Armaspec SFT45/90 solves one of the more annoying puzzles in an AR build: picking between a 45-degree short throw and a traditional 90-degree safety. This one does both. Set it up as a fast 45-degree flick or a full 90-degree throw depending on your receiver markings and how you like to run your thumb. That flexibility means it drops into AR-15 and AR-10 style lowers running a mil-spec trigger without leaving you stuck with the wrong part on the shelf.
What Makes the SFT45/90 Worth the Swap
The build quality is where this selector earns its keep. It uses a double-sided hardened steel core that threads through your receiver, paired with machined aluminum levers finished in Flat Dark Earth. That combination keeps things light on the outside while the guts stay tough where it counts. Reach for it and you get a smooth, positive movement with a lockup that leaves zero doubt about whether you're on Safe or Fire.
Ambi Function for Any Grip
The SFT45/90 ships with two levers, one long and one short, so lefties, righties, and folks who just like a low-profile lever on the strong side can set it up their way. The levers wear a non-slip texture that keeps your thumb planted when you're moving fast. Since it works from either side of the receiver, it's a natural fit for shared range rifles, duty builds, or anyone who trains switching shoulders.
Installing the Armaspec SFT45/90
Installation is straightforward for anyone comfortable working on an AR lower. The kit includes the Torx screws and the Torx key you need to lock the levers down, and it drops in cleanly on standard mil-spec lower parts. The FDE finish pairs nicely with tan and earth-tone builds or adds a subtle two-tone accent to a black rifle. Made in the USA and backed by Armaspec's lifetime warranty, it's a small upgrade that makes a real difference in how your rifle handles.
Key Specifications
- Manufacturer: Armaspec
- Model: SFT 45/90
- Manufacturer Part Number: ARM113-FDE
- UPC: 810048490899
- Color: Flat Dark Earth
- Throw Options: 45 degree short throw or 90 degree full throw
- Operation: Fully ambidextrous
- Lever Material: Machined aluminum
- Core Material: Hardened steel
- Platform Compatibility: AR-15 (5.56/.223) and AR-10 (7.62/.308)
- Trigger Compatibility: Mil-spec trigger
- Length: 5.75 in
- Country of Origin: Made in USA
- Warranty: Lifetime warranty
What’s Included
- Armaspec SFT45/90 ambidextrous safety selector core
- Two aluminum levers (one long, one short)
- Torx mounting screws
- Torx key
Frequently Asked Questions
Does the SFT45/90 work in both 45 and 90 degree throw?
Yes, that is the whole idea behind it. The selector can be set up as a 45-degree short throw or a standard 90-degree full throw, so you match it to your receiver markings and preference. Use the setting your lower is marked for.
Will this Armaspec safety selector fit my AR-10?
It does. The SFT45/90 is designed for both AR-15 (5.56/.223) and AR-10 (7.62/.308) style rifles. As long as you are running a mil-spec trigger, it drops in without any special fitting.
What comes in the box and do I need extra tools?
The kit includes the ambidextrous core, two aluminum levers, the Torx mounting screws, and the Torx key needed to tighten everything down. Most folks can install it with just what is in the package plus a standard AR lower parts setup. It is a straightforward job for anyone who has worked on an AR lower before.
Are both levers the same size on the SFT45/90?
No, it ships with two different levers, one long and one short. That lets you set up a full-size lever on one side and a lower-profile lever on the other, or match it to left or right-handed use. The levers also have a non-slip texture to keep your thumb from slipping during quick manipulation.






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