Fortis Manufacturing Magazine Catch Billet AR 15/AR 10 Case Hardened. Easily installs in seconds and instantly upgrades your rifle. This upgrade is CNC machined from a solid piece of 303 Stainless Steel finished with Black Nitride Coated or Case Hardened. Specifications for Fortis Manufacturing Magazine Catch: Manufacturer: Fortis Manufacturing Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Weight: 0.33 oz Condition: New Features of Fortis Manufacturing Magazine Catch Material Catch: T6-6061/303 SS Catch Rod: 303 SS Finish: Hardcoat Anodize Weight w/ Rod: 5.5g Package Contents: Fortis Manufacturing Magazine Catch What firearm models does the manufacturer say Fortis Manufacturing Magazine Catch is compatible with? The manufacturer says that Fortis Manufacturing Magazine Catch is compatible with AR-15 AR-10Fortis Manufacturing AR15-MC-CS-CH: Magazine Catch Billet AR 15/AR 10 Case Hardened