Battle Arms Development Magazine Release Kit, Package 2, BAD-EMMR-B-L (Enhanced Modular Magazine Release - Large - Black), AR15-MCS (Magazine Release Spring) and BAD-EMC-IC (Enhanced Magazine Catch) BAD-MRK-PK2
Specifications:

Type
Model	Enhanced
Dimensions	Black Phosphate
Size	Enhanced Magazine Release Kit
Material	8620 Steel
Action
Trigger	AR-15,AR10
Safety
Thread Pattern
Finish	Phosphate
Bolt Type
Hand
Hammer Type
Capacity