FEATURES: 100% CNC machined Built in Spacer Kit Adjustable Steel Mag Catch 12 Round Capacity (except 10 Round Compliant Option) 10 Round and 12 Round Indicators Easy Disassembly for Cleaning Textured Base Sidewalls for Positive Gripping Caliber Compatibility: BR BRA Dasher Dimensions: Outer: 4.1″ x 3.06″ x 0.94″ Max Internal Bullet Length: 2.490″ Weight: 5.8oz