Battle Arms Development Enhanced Magazine Catch AR-15 Investment Cast 8620 Steel Black Phosphate. Length: Shorter Threaded Pin to Reduce Installed Magazine Button Profile of Solid Face Magazine Release Buttons Weight: 0.25 oz (v.s. 0.32 oz Mil-Spec) Specifications for Battle Arms Development AR-15 Cast Enhanced Magazine Catch: Manufacturer: Battle Arms Development Gun Model: AR-15 Finish: Black Phosphate Finish Gun Type: Rifle Condition: New Package Contents: Battle Arms Development AR-15 Cast Enhanced Magazine Catch What firearm models does the manufacturer say Battle Arms Development AR-15 Cast Enhanced Magazine Catch is compatible with? The manufacturer suggests that Battle Arms Development AR-15 Cast Enhanced Magazine Catch is compatible with AR-15Battle Arms Development BAD-EMC-IC: Enhanced Magazine Catch AR-15 Investment Cast 8620 Steel Black Phosphate