*IMPORTANT NOTE: CHECK STATE REGULATIONS REGARDING FORCED RESET SYSTEMS BEFORE STAGING YOUR BUILD!*
Atrius Development Group 3-Position Forced Reset Selector (FRS) - Standard Single-Lever Layout, Heat-Treated 4140 Steel, Black Nitride Finish - ADG-FRS-S
Product Description
Upgrading your standard defensive rifle to achieve lightning-fast follow-up shots traditionally required replacing the entire trigger with a drop-in cassette-style forced-reset trigger (FRT). However, early replacement triggers often suffer from high mechanical stress, rapid parts wear, and finicky field maintenance on your staging bench. The **Atrius Development Group® Forced Reset Selector (ADG-FRS-S)** flatlines these issues. It moves the entire forced-reset mechanism into a rugged, multi-position safety selector drum, leaving your rifle's primary trigger housing completely untouched.
Proudly engineered, multi-axis CNC-machined, and performance-calibrated in the United States, this revolutionary "Super Safety" style component updates your manual of arms across three positive indexing modes: **SAFE, SEMI (Traditional Single-Shot), and SUPER-SEMI (Mechanically Assisted Forced Reset Mode)**. Machined from a solid block of **military-grade, heat-treated 4140 steel alloy**, the core selector drum features an integrated mechanical dovetail cam. In Super-Semi mode, this cam interacts directly with a standard hammer and bolt carrier group. The cyclic stroke of a full-auto-profile bolt carrier actively pushes the trigger blade forward into its reset position during recoil, mechanically eliminating travel lag for ultra-fast split times.
Featuring a clean, traditional single-side tactical thumb lever layout, a crisp 90-degree indexing detent path, and zero permanent receiver modifications required, this turn-key armorer asset brings complete fire control innovation to your workbench.
*Armorer Bench Notes & Real-World System Tuning Guidance: The Atrius ADG-FRS-S selector system arrives ready for assembly with the 4140 steel cam drum core, a single low-profile right-hand side thumb lever, a custom T10 Torx fastener screw (4-40 thread), an indexing spring, and a premium detent pin. CRITICAL RECOIL & FIRE CONTROL INTERFACE MATRIX: This specialized safety selector is designed natively and strictly to interface with **standard Mil-Spec AR-15 lower receivers (.223/5.56/.300 BLK) running full-profile, Mil-Spec fire control groups**. *Trigger Geometry Constraint:* Your mil-spec trigger rear section must be completely square—this system **will not function with triggers that have a rear U-notch relief cut**. ESSENTIAL CYCLING UPGRADES FOR SUCCESSFUL STAGING: Because the system relies on physical contact during recoil, your host rifle **MUST utilize a Full-Auto (FA) profile Bolt Carrier Group** to trip the selector cam. To eliminate bolt bounce and avoid light primer strikes downrange, you must pair this assembly with a heavy **H2 or H3 tungsten-weighted buffer module** inside carbine receiver extensions (or a standard rifle buffer on 20" fixed stocks). Armorer Workbench Staging Sequence: 1. Visually and physically confirm your workspace is completely clear of live ammunition. 2. Remove the pistol grip screw to safely capture your lower receiver's factory safety spring and detent pin. 3. Swap the OEM selector out for the Atrius 4140 steel drum. 4. Slide the standard single thumb lever onto the drum dovetail, apply a drop of blue thread locker to the T10 4-40 fastener screw, and torque down to exactly **15 inch-pounds (in-lbs)**. 5. Perform a multi-stage function test using dummy rounds on your bench to verify positive sear reset and selector indexing before live-fire staging downrange.*
Key Features
- Advanced 3-Position Selection: Delivers three distinct operational positions: SAFE, traditional SEMI-AUTO, and high-speed mechanically assisted SUPER-SEMI.
- Active Trigger Assist Cams: Leverages the rearward movement of the bolt carrier group to actively force the trigger forward into its reset position, cutting down split times.
- Premium Heat-Treated 4140 Steel: CNC-machined from ultra-hard military steel billet to stand up to heavy high-volume cyclic impact forces without deforming.
- Standard Single-Lever Manual of Arms: Employs a low-profile single-side thumb lever that keeps the left face of the lower receiver clean and snag-free during traditional transport.
- Wear-Reducing Mechanical Leverage: Operates directly off the primary safety drum axis, causing far less internal component fatigue than early trigger-swapped FRT drop-ins.
- Corrosion-Resistant Black Nitride Finish: Coated in a deep, slick black nitride treatment that sheds moisture, carbon fouling, and harsh chemical cleaning solvents.
Product Specifications
- Brand: Atrius Development Group® / ADG (Made in USA)
- Model Line: High-Performance Three-Position Mechanical Assisted Forced Reset Selectors
- MPN/SKU Code: ADG-FRS-S (Standard Single-Lever Specification Safety Variant)
- UPC Code Profile: 850079014008
- Lower Receiver Compatibility: Standard AR-15 Mil-Spec Receivers (FA Pocket / Low Shelf Requirements)
- Fire Control Group Match: Full-Profile Mil-Spec Triggers (No Rear U-Notch/Relief Cuts Allowed)
- Bolt Carrier Group Requirement: Traditional M16 / Full-Auto Profile Carrier Groups Only
- Recommended Recoil Buffer Matrix: Minimum H2 / Recommended H3 Heavy Tungsten Weight Buffers
- Selector Cam Material Core: Premium Multi-Axis CNC-Machined Heat-Treated 4140 Carbon Steel Billet
- Exterior Finish Dressing: Industrial Grade Anti-Wear Corrosion-Resistant Smooth Black Nitride Shield
- Selector Control Layout: Single Right-Hand Side Throw Lever (Traditional Thumb Manipulation Profile)
- Fastener Mounting Torque Spec: 15 Inch-Pounds Maximum (T10 Torx Screw, 4-40 Thread Metric Limits)
- Full Kit Component Checklist: Completed 4140 Cam Drum, Single Tactical Lever, T10 Lever Screw, Spring/Detent Set
- Packaging Format Class: Branded Factory Retail Sealed Protection Pack with Tech Guidelines Insert
- Product Type Category: Rifle Components / Specialized Fire Control Upgrades & Safety Selectors
- Overall Unit Silhouette Profile: 3-Position Linear Multi-Cam Variable Indexing Core Cylinder
- Net Component Module Mass: ~0.70 Ounces (Ultra-Lightweight High-Tensile Rigid Steel Core Weight)
- Jurisdictional Delivery Exclusions: Restricted for transport into CA, CT, DE, FL, HI, IL, MD, MA, MN, NJ, NV, NY, OR, RI, WA, and D.C.
- Warranty Tracking Protection: Fully Backed by Atrius Development Group Factory Product Coverage
