Mil-Spec Atrius Forced Reset Selector

This is the Atrius Mil-Spec FRS (single side) featuring a mil-spec selector switch and a traditional design that looks great, especially if you're working on a retro build. 

It's the most robust solution on the market that enables the user to have 3 positions; SAFE, SEMI (Traditional) and SUPER-SEMI. This Forced Reset Selector (FRS) is compatible with mil-spec/full-profile AR15 (chambered in .223/5.56/.300 BLK) fire control groups with no modifications required.

*Packaging will come with a black Atrius bag, the same as our original single-sided FRS. Please be aware of scams and copies on the market.

$199.00
Ships within 1-3 business days
Availability: Limited to 10 units per purchase
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Manufactured In USA

PRODUCT SPECIFICATIONS

Precision-engineered from heat-treated 4140 steel, the Atrius Mil-Spec FRS delivers uncompromising performance in a drop-in package. Experience forced reset technology without the wear and complexity of traditional FRT systems.

Features
  • Style: Mil-spec w/ Ergonomic Ridges & Pointer for Position Reminder
  • 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
PRODUCT SPECIFICATIONS
Drop-In Installation

Drop-In Installation

Swap out your factory safety in minutes and experience the next level of firearm ownership.

Runs with Mil-Spec Fire Control Groups

Runs with Mil-Spec Fire Control Groups

Seamlessly integrates with standard AR fire control groups, ensuring flawless function and longevity without modification.

Hardcore Durability

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.

Mechanically Leveraged Design

Mechanically Leveraged Design

Reduces wear on your rifle — unlike forced-reset triggers (FRTs) that accelerate internal component degradation.

Aggressive Ergonomics

Aggressive Ergonomics

Textured, chamfered-edge, and purpose-built design for speed. Your fingers will find the selector instantly, even under stress.

Atrius Forced Reset Selectors

Product Comparison

Product
Single Switch
Ambi Switch
Lever Blocker
Notes
FRS Standard / Single
Yes
Standard ergonomic switch for ease of use
FRS Mil-Spec / Single
Yes
Has mil-spec style switch
FRS Ambi
Yes
Great for left-handed users
FRS Ambi G-Lever
Yes
Yes
Has additional Geissele trigger compatibility

Compatibility

  • 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.

View Full Compatibility Table

VIDEOS

Corrosion-Resistant Coating

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

Product Reviews

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