Atrius Development 3 Position Super Selector Safety
The Atrius Development 3 Position Super Selector Safety is built for AR-15 owners who want a robust, fast-handling selector with three distinct modes for confident control. With a crisp 90-degree throw and positive detents, it delivers consistent engagement and quick transitions under stress. Precision-machined from heat-treated 4140 steel with a corrosion-resistant finish, it’s designed for hard use and long service life.
Designed for mil-spec AR-15 fire control groups in .223/5.56/.300 BLK, this selector installs as a drop-in replacement for most builds, though minor fitment may be required depending on receiver tolerances.
Features
- Three-position selector: SAFE / SEMI / SUPER-SEMI
- Mil-spec AR-15 compatibility for .223/5.56/.300 BLK builds
- Textured, chamfered levers for confident thumb activation
- Positive detents and tactile clicks for secure engagement
- Heat-treated 4140 steel construction with corrosion-resistant finish
- Quick installation; minor fitment may be required due to tolerance stacking
Specifications
- Material: Heat-treated 4140 steel
- Finish: Corrosion-resistant finish
- Weight: 0.2 oz
- Throw Angle: 90°
- Dimensions: 5″ L x 4″ W x 1″ H
- Compatibility: Mil-spec AR-15 lowers / FCGs (.223/5.56/.300 BLK)
- Origin: Made in the USA












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