Angstadt Arms complete upper receiver assembly is ready to run out of the box with a sound suppressor! This pistol upper features a 9mm 3-lug muzzle brake” Blastwave blast shield and Radian Weapons Ambidextrous charging handle. Compatible with any 9mm GLOCK(R) and COLT(R) style AR-15 lower receiver. Complete 9mm upper receiver assembly with 4.5″ barrel” 4″ ultra light hand guard and Radian ambi charging handle. Ready to run with a 9mm sound suppressor via 3-lug.