Description
ATRIUS DEVELOPMENT FORCED RESET SELECTOR (FRS) AMBI MIL-SPEC
This is the Atrius Ambidextrous Mil-Spec Forced Reset Selector, featuring a mil-spec selector switch and a traditional design that looks and feels great. Now featuring a switch on both sides so cloners, retro-builders, and lefties alike can enjoy this FRS option for their next fast-shooting platform.
It’s the most robust solution on the market, enabling the user to have 3 positions: SAFE, SEMI (Traditional) and SUPER-SEMI. This Forced Reset Safety (FRS) is compatible with mil-spec/full-profile AR-15 (chambered in .223/5.56/.300 BLK) fire-control groups with no modifications required.
*Packaging will come in a M81 Camo Atrius bag. Please be aware of scams and copies on the market.
Precision-engineered from heat-treated 4140 steel, the Atrius FRS delivers uncompromising performance in a drop-in package. Experience forced reset technology without the wear and complexity of traditional FRT systems.
Features
- Configuration: Safe | Semi | Super-Semi
- Compatibility: Mil-Spec AR15 (.223/5.56/.300 BLK)
- Installation: Drop-In Ready (No Modifications Necessary)
- Made in the USA
Materials
- Finish: Corrosion-Resistant Black Nitride
- Material: Heat Treated 4140 Steel
Swap out your factory safety in minutes and experience the next level of firearm ownership.

Runs with Mil-Spec Fire Control Groups
Seamlessly integrates with standard AR fire control groups and some cassette style triggers.

Hardcore Durability
Crafted from heat-treated, 4140 steel and coated in a corrosion-resistant black nitride finish. Rain, mud, sweat—it eats it all for breakfast.

No Modifications Necessary
No cutting your triggers. Ensures flawless function and longevity without modification.

Aggressive Ergonomics
Mil-spec style switch. Your fingers will find the familiar selector instantly, even under stress.
- All Atrius FRS products have direct compatibility with mil-spec triggers that do not have a relief cut (U-notch).
- They also are compatible with a wide variety of single-stage, drop-in / cassette style triggers as well.
- The “G-LEVER” is the only FRS product that carries expanded compatibility to work with select Geissele triggers and similar products that feature a reduced hammer design.
Compatibility Note
The FRS is drop-in compatible designed with mil-spec and full profile AR15 components. Check out our compatibility page for more information.
Advanced black nitride finish
Machined & Heat-Treated 4140 Body
Military-grade steel construction for maximum durability
Positive Positioning Detent
Precise 90° indexing with tactile feedback
Restricted States
This product cannot be shipped to the following states:
- California
- Connecticut
- Colorado
- Delaware
- District of Columbia
- Florida
- Hawaii
- Illinois
- Maryland
- Massachusetts
- Minnesota
- Nevada
- New Jersey
- New York
- Oregon
- Rhode Island
- Virginia
- Washington
- US Territories
- International
Legal Compliance
By purchasing this product, you acknowledge that you are legally permitted to own and possess it in your jurisdiction. It is your responsibility to ensure compliance with all federal, state, and local laws. The Atrius FRS is designed as a safety selector and must be used in accordance with all applicable firearms regulations. We are not responsible for misuse or violations of law.
Important Notice
This product is intended for lawful use only. Purchaser assumes all responsibility for legal compliance in their jurisdiction.
Manufacturer Part #: ADG-FRS-AMBI-MS
UPC: 850079014091






















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