Atrius Development Group Ambidextrous Forced Reset Selector Features The Atrius Development Group Ambidextrous Forced Reset Selector is designed around a forced reset operating concept that improves mechanical speed and responsiveness within compatible mil spec AR-15 trigger groups. Its three position layout provides distinct tactile transitions between SAFE traditional SEMI and the enhanced FULL-SEMI setting allowing users to take advantage of refined selector control. These performance characteristics make it a compelling upgrade for platforms needing precise selector feedback in demanding shooting environments. Crafted from heat treated 4140 steel this selector is built for long term durability and reliable installation across properly spec'd lowers. A corrosion resistant finish protects the component from wear and environmental exposure while the ambidextrous configuration supports efficient operation for both right and left handed users. Its drop in nature simplifies installation when paired with compatible triggers and the included T10 selector screw ensures secure mounting as part of a complete AR-15 control enhancement. Atrius Development Group Ambidextrous Forced Reset Selector Specifications Manufacturer: Atrius Development Group Model: Ambidextrous Forced Reset Selector Product Type: 3 Position Forced Reset Selector Compatibility: Mil spec AR-15 fire control groups for .223 5.56 .300 BLK Material: Heat Treated 4140 Steel Finish: Corrosion Resistant Coating Selector Positions: SAFE SEMI FULL-SEMI Installation: Drop In for Compatible Mil Spec Lowers (Some Lowers May Require Fitting) Requirements for Reliable Function: Mil Spec Trigger Without Rear Relief Cut; FA Pocket or Low Shelf Lower; FA Bolt Carrier Group; H2 or H3 Buffer Recommended Selector Screw: T10 4/40 Thread Special Notes: May Require Gunsmithing on Some Platforms; Not Compatible with AR-10 Platforms Without Significant Modification