Black Rain Ordnance AR-15 Low Profile Gas Block .750 Steel Black Features: Black Rain Ordnance is a precision firearms manufacturer specializing in tactical style rifles and accessories. Black Rain Ordnance strives to use only American metal ensuring that all products carrying their seal are made in America by American workers. See what all your friends have been talking about add some Black Rain Ordnances parts to your next gun build. Black Rain Ordnance AR-15 Low Profile Gas Block .750 Steel Black Specifications: Manufacturer:Black Rain Ordnance Color: Black Gas Block Diameter:.750 Gas Block Height Over Bore:1.36 Gas Block Length:1.03 Gas Block Overall Height:Low Profile