Armaspec ST45 45-Degree Short Throw Ambidextrous Safety Selector Black - ARM112-BLK

Armaspec ST45 45-Degree Short Throw Ambidextrous Safety Selector - Black - ARM112-BLK - UPC: 810048490813

Product Description

The Armaspec ST45 is a high-performance 45-degree short throw ambidextrous safety selector engineered for AR-15 and AR-10 platform rifles. Designed to halve the rotational travel required by standard 90-degree mil-spec safety levers, the ST45 enables rapid manipulation between safe and fire positions. This reduced throw angle speeds up weapon staging and target engagement while reducing thumb reach requirements during high-tempo shooting drills.

Constructed with a hardened steel center core and lightweight machined aluminum levers, the ST45 achieves positive tactile detent engagement with minimal drag. The ambidextrous layout features a full-length main lever paired with a low-profile off-side lever to prevent interference with the shooter’s trigger finger during operation. Both levers attach securely to the center core via Torx fasteners, ensuring a rock-solid mechanical lockup under heavy recoil.

Finished in a durable matte black anodize, the ST45 integrates seamlessly into duty, competition, or defensive carbine builds. Note: The ST45 is specifically geometry-tuned for lower receivers featuring 45-degree selector markings and short-throw detent paths.

*Armorer Bench Notes & Real-World Staging Guidance:
Platform Compatibility Matrix:
• Primary: AR-15 (5.56/.223, 300 BLK, 9mm) and AR-10/LR-308 (.308/6.5 C) lower receivers.
• Receiver Compatibility Requirement: Intended for lowers with 45-degree safety throw markings.

Assembly & Staging Steps:
1. Remove pistol grip, safety detent, and spring from the lower receiver.
2. Insert the steel center core through the selector hole from the left side.
3. Reinstall safety detent and spring, securing the pistol grip back to standard torque.
4. Attach the primary and short levers using the included Torx key and screws; apply medium-strength threadlocker to screw threads to prevent backing out under fire.

Key Features

• 45-degree short throw design reduces manipulation distance by 50% compared to mil-spec selectors.
• Ambidextrous configuration with standard primary lever and short off-side lever to maximize clearance.
• Precision-machined steel center core paired with aircraft-grade aluminum selector levers.
• Corrosion-resistant matte black finish for a low-glare tactical profile.
• Includes Torx mounting screws and installation key for immediate assembly out of the package.
• Made in the USA and backed by Armaspec's lifetime warranty.

Product Specifications

• Brand: Armaspec
• MPN / Model: ARM112-BLK / ST45
• UPC: 810048490813
• Throw Angle: 45 Degrees
• Material: Steel Center Core / Aluminum Levers
• Finish: Black Anodized
• Platform Fitment: AR-15 / AR-10 / LR-308 Lower Receivers
• Mass: 0.53 oz (15 g)