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Atrius Development Group Forced Reset Selector Mil-Spec Single Side - ADG-FRS-S-MS - UPC 850079014084
Product Description
The Atrius Development Group Forced Reset Selector (FRS) Mil-Spec Edition is an innovative fire control component engineered to upgrade standard AR-15 rifles into three-position selector platforms. Designed as a drop-in replacement for traditional safety selectors, the Atrius FRS introduces a functional third position—Safe, Semi (standard single shot), and Super-Semi (forced reset mode). In the Super-Semi position, the selector leverages internal mechanical geometry to assist in rapidly resetting the trigger tail forward after each cycle, enabling dramatically faster follow-up shots while utilizing your existing fire control group.
Precision-machined from heat-treated 4140 steel and finished in a corrosion-resistant black coating, the ADG-FRS-S-MS is built to withstand high-volume firing schedules and harsh field environments. Unlike standalone forced-reset trigger (FRT) drop-in cassettes that place extreme wear on internal receiver pins and bolt carriers, the Atrius FRS utilizes a mechanically leveraged selector interface that reduces stress on rifle components. This Mil-Spec version features a traditional single-sided selector lever profile with crisp, tactile 90-degree position detents for positive thumb manipulation under stress.
Engineered to interface directly with full-profile Mil-Spec lower receivers and full-auto bolt carrier groups chambered in .223 Rem, 5.56 NATO, or .300 Blackout, the Atrius FRS requires no permanent modification to your receiver. It offers a reliable, low-wear alternative for shooters seeking high-rate trigger mechanics without sacrificing traditional Semi-Auto functionality.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits standard Mil-Spec AR-15 lower receivers with low-shelf/full-profile trigger pockets. Requires a full-auto (M16 profile) bolt carrier group and a true Mil-Spec single-stage trigger featuring a solid/squared-off rear trigger tail. Will NOT fit triggers with 'U' notches, relief cuts, cassette-style match triggers, or high-shelf lower receivers without gunsmith modification.
- Verify the firearm is completely unloaded, clear the chamber, and separate the upper receiver from the lower receiver.
- Unscrew the pistol grip fastener, carefully remove the grip while capturing the safety selector detent and spring from the lower receiver channel, and remove the stock safety selector.
- Insert the Atrius FRS cylinder through the receiver selector port, ensure proper engagement with your Mil-Spec trigger tail, reinstall the detent, spring, and pistol grip, and perform a comprehensive dry-fire function check in all three selector positions before live firing.
Key Features
- Three-Position Selector Functionality: Select between traditional SAFE, standard SEMI, and high-rate SUPER-SEMI forced-reset modes.
- Drop-In Installation: Replaces factory AR-15 safety selectors in minutes with no permanent gunsmithing or lower receiver milling required.
- Heat-Treated 4140 Steel Construction: High-tensile alloy engineered for extreme impact resistance, corrosion prevention, and long-term durability.
- Low-Wear Mechanical Leverage: Interacts with Mil-Spec fire control groups to assist trigger reset without accelerating receiver or BCG degradation.
- Mil-Spec Single-Side Ergonomics: Features classic single-sided lever geometry with aggressive stippling and positive 90-degree detent clicks.
Product Specifications
- Brand: Atrius Development Group
- Model: Forced Reset Selector (Mil-Spec Single Side)
- MPN: ADG-FRS-S-MS
- UPC: 850079014084
- Platform Compatibility: AR-15 (Mil-Spec Low-Shelf Lowers / Full-Auto BCGs)
- Material: Heat-Treated 4140 Steel
- Finish: Corrosion-Resistant Black Matte
- Selector Throw: 90-Degree Standard Throw
- Positions: 3-Position (Safe / Semi / Super-Semi)
