Atrius FRS Super Safety Forced Reset Selector for Mil-Spec AR-15

Atrius Forced Reset Selector (FRS) – Super Safety

The Atrius Forced Reset Selector (FRS) provides three distinct selector positions: SAFE, SEMI (Traditional), and FULL-SEMI.

Key Features

• Ultra-smooth engagement with a crisp, tactile 90-degree throw
• Runs with mil-spec AR-15 fire control groups (no modification required)
• Positive, rock-solid positioning with no slippage
• Durability: machined from heat-treated 4140 steel with a corrosion-resistant finish
• Drop-in installation (some fitment may be required)

Compatibility & Setup Requirements

• Mil-spec trigger with no relief cut (rear of trigger squared off; no “U” notch)
• Lower receiver must have an FA pocket or low shelf
• FA bolt carrier group required
• H2 or H3 buffer weight strongly recommended
  • Minimum H2 (H3 recommended) for carbine extensions and 16" or shorter barrels
  • Standard rifle buffer for 20" A2 stocks

Compatibility Notes (as stated)

• AR9 variants may require professional gunsmithing
• Will not work with AR-10 (LR308)/SR-25 platforms without significant gunsmithing
• “Super Safety” modified firearms may not be compatible due to the FRS solid lever cam design

Selector Screw (installation note)

• T10, 4/40 thread
• Uses McMaster-Carr spring 9657K619
• Torque: 15 in/lbs with blue Loctite only