Atrius Ambidextrous Forced Reset Selector

The Atrius Ambidextrous Forced Reset Selector (FRS) is the most robust three-position selector solution on the market, engineered to give the shooter a true advantage: SAFE, SEMI (traditional), and FULL-SEMI. Built for mil-spec AR-15 fire control groups chambered in .223 / 5.56 / .300 BLK, the Atrius FRS installs as a drop-in replacement with no fire-control modifications required, delivering rock-solid engagement and repeatable performance for range, competition, and field use (including hunting setups).

Reliability was central to the design. The Atrius FRS is optimized for mil-spec triggers that do not have a relief cut—i.e., the rear of the bottom half of the trigger must be completely squared off (not a U-notch). Your lower receiver must feature an FA pocket or low shelf, and the system must be used with an FA bolt carrier group. We strongly recommend H2 or H3 buffer weights to ensure consistent, reliable operation across shooting conditions.

Performance highlights include an ultra-smooth, crisp 90° throw with tactile clicks and engineered positive positioning to eliminate slippage or accidental movement during use. The mechanically leveraged FRS design reduces wear on internal rifle components compared with many forced-reset trigger systems, extending service life. Aggressive, chamfered ergonomics and textured surfaces give immediate, confident thumb purchase under stress or while wearing gloves. Constructed from heat-treated 4140 steel with a corrosion-resistant finish, the Atrius FRS is built to resist the elements and the rigors of heavy use.

Installation is straightforward — swap your factory selector and be back behind the trigger in minutes (some fitment may be required depending on lower tolerances). Proudly Made in the USA.

Shipping & purchase limits: Please allow 4 weeks to ship. Limit 3 per customer.

Legal notice: By purchasing this product you acknowledge you understand and will comply with all applicable federal, state, and local firearms laws. Laws regarding firearm parts and accessories vary by state; it is the buyer’s responsibility to confirm legality where they live. Atrius Development Group does not guarantee legality in your jurisdiction and is not responsible for misuse or illegal activity. By completing your purchase you confirm you are complying with all applicable regulations.

Restricted states: Not for sale or shipment to CA, CT, DE, FL, HI, IL, MA, MD, MN, NJ, NV, NY, OR, RI, WA, D.C. No US Territories. No international orders.