AT3 Tactical AR-15 Front Sight Adjustment Tool. Most rear sights dont require much in the way of tools but many front sights use an A2 style post. This simple front sight tool for the AR-15 works with a wide variety of front sights enabling you to quickly and easily adjust elevation for your front sight. This sight tool includes the standard four prong arrangement for adjusting A2 sights plus a five prong for A1 sights. The latter is a bit more rare these days but if youve got a true retro rifle this tool has you covered for the front sight. Specifications for AT3 Tactical AR-15 Front Sight Adjustment Tool: Manufacturer: AT3 Tactical Gun Type: Rifle Gun Make: AR Platform Gun Model: AR-15 Fabric/Material: Steel Color: Black Package Contents: AT3 Tactical AR-15 Front Sight Adjustment Tool What firearm models does the manufacturer say AT3 Tactical AR-15 Front Sight Adjustment Tool is compatible with? The manufacturer suggests that AT3 Tactical AR-15 Front Sight Adjustment Tool is compatible with AR-15AT3 Tactical AT3-FRONT-SIGHT-TOOL: AR-15 Front Sight Adjustment Tool