ANGSTADT UPPER UDP-9 9MM 6in W/BLAST CAN 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 - 6in 9mm lightweight profile barrel made from 4140 chrome-moly steel with a 1-10in twist rate. 1/2×36 TPI - 5.5in ultra light hand guard with M-LOK mounting interface on the 3, 6, & 9 O’clock positions - The hand guard features 2 QD swivel mounting points and a continuous top mil-spec 1913 picatinny rail with lightening cut - Handguard ID: 1.375in The last 3/4in of the handguard is bored out to 1.405in, allowing most aftermarket sound suppressors 1.39in 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