*IMPORTANT NOTE: CHECK STATE REGULATIONS REGARDING FORCED RESET SYSTEMS BEFORE STAGING YOUR BUILD!*
Atrius Development Group Ambidextrous Forced Reset Selector (FRS) - 3-Position "Super Safety" System, Heat-Treated 4140 Steel, Black Nitride Finish - ADG-FRS-AMBI
Product Description
Upgrading your standard defense rifle to achieve ultra-fast split times traditionally required drop-in forced-reset triggers (FRTs). However, early cassette-style FRT systems are notorious for accelerated internal component wear, high friction stress, and complicated teardowns on your staging bench. The **Atrius Development Group® Ambidextrous Forced Reset Selector (ADG-FRS-AMBI)** flatlines these operational bottlenecks. It moves the entire forced-reset mechanical interface into a rugged, dual-sided manual safety selector drum, preserving your rifle's standard trigger group design.
Proudly engineered, multi-axis CNC-machined, and performance-tested in the United States, this breakthrough "Super Safety" selector delivers an advanced manual of arms across three positive indexing zones: **SAFE, SEMI (Traditional Single-Shot), and SUPER-SEMI (Forced Reset Mode)**. Machined from a unibody block of **military-grade, heat-treated 4140 steel alloy**, the center drum features an integrated mechanical dovetail cam. In Super-Semi mode, this cam interacts directly with the tail of 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. This mechanical assistance cuts out traditional trigger travel lag for lightning-fast follow-up shots.
Complete with a full-profile ambidextrous dual-lever set, precision ground detents for crisp 90-degree clicks, and zero permanent frame modifications required, this turn-key armorer component brings complete fire control innovation to your workbench.
*Armorer Bench Notes & Real-World System Tuning Guidance: The Atrius ADG-FRS-AMBI selector system arrives unboxed with the 4140 steel cam drum, left and right tactical levers, a custom T10 Torx assembly screw (4-40 thread), and a high-memory spring/detent kit. CRITICAL RECOIL & TRIGGER 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 grip assembly screw to 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 ambidextrous levers onto the drum dovetails, apply a drop of blue thread locker to the T10 4-40 fastener screws, 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.
- True Ambidextrous Control: Features textured, dual-sided levers that let you manipulate and clear the safety smoothly from either shoulder or during off-hand barricade drills.
- 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-AMBI (Ambidextrous Specification Safety Variant)
- UPC Code Profile: 850079014015
- 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: Dual Levers (Full Ambidextrous Left/Right Hand Side Thumb Manipulation)
- Fastener Mounting Torque Spec: 15 Inch-Pounds Maximum (T10 Torx Screw, 4-40 Thread Metric Limits)
- Full Kit Component Checklist: Completed 4140 Ambi Drum, Left/Right Tactical Levers, T10 Lever Screws, 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: ~0.80 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
