Luth-AR Magazine Catch Assy Black. LLR-16 Magazine Catch Spring 1-ea. LLR-17 Magazine Catch Button Aluminum 1-ea. SKU: LLR-13A Specifications for Luth-AR Magazine Catch Assembly: Manufacturer: Luth-AR Color: Steel Finish: Magnesium Phosphate Caliber: .223 Remington Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Weight: 0.4 oz Package Contents: Luth-AR Magazine Catch Assembly LR-13 AR Magazine Catch 1-ea. LR-16 Magazine Catch Spring 1-ea. LR-17 Magazine Catch Button Aluminum 1-ea. Luth-AR LR-13A: Magazine Catch Assy Black