AT3 Tactical Mil-Spec AR-15 Magazine Catch Button FDE. The magazine catch button is no exception. Steel construction with proper threading and dimensions plus a durable Melonite finish to lasting wear protection. If you ended up with a damaged or missing piece this is a perfect replacement. Consider pairing this with AT3s Mil-Spec Magazine Catch Specifications for AT3 Tactical Mil-Spec AR-15 Magazine Catch Button: Manufacturer: AT3 Tactical Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Condition: New Features of AT3 Tactical Mil-Spec AR-15 Magazine Catch Button Mil-Spec dimensions and function Black Melonite finish or colored Cerakote finishes Fits: AR-15 Package Contents: AT3 Tactical Mil-Spec AR-15 Magazine Catch Button What firearm models does the manufacturer say AT3 Tactical Mil-Spec AR-15 Magazine Catch Button is compatible with? The manufacturer suggests that AT3 Tactical Mil-Spec AR-15 Magazine Catch Button is compatible with AR-15AT3 Tactical AT3-MCButton-03-FDE: Mil-Spec AR-15 Magazine Catch Button FDE