Angstadt Arms 9mm Upper with 4.5" Barrel, Black - AAUT109045

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. - 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 and COLT style AR-15 lower receiver. - Features: - 7075-T6 billet aluminum slick side pistol caliber upper receiver with appropriately sized ejection port - 4.5 9mm lightweight profile barrel made from 4140 chrome-moly steel with a 1-10 twist rate. 1/236 TPI - 4 ultra light hand guard with M-LOK mounting interface on the 3 6 & 9 Oclock positions - The hand guard features 2 QD swivel mounting points and a continuous top mil-spec 1913 picatinny rail with lightening cut - Handguard ID: 1.375* The last of the handguard is bored out to 1.405 allowing most aftermarket sound suppressors 1.39 in diameter and smaller to tuck inside of the handguard - Black nitride 9mm AR-15 bolt carrier group. For use with a standard AR-15 hammer - Compatible with both GLOCK and COLT style 9mm dedicated lower receivers. - Angstadt Arms 3-Lug muzzle brake - Angstadt Arms Blastwave blast shield - Radian Weapons ambidextrous LT charging handle - Weight: 2.6 lbs - Caliber: 9mm NATO