The Sanders Armory MATCH GRADE 24″ Stainless Steel 6.5 Grendel Upper Assembly Package includes An AR15 Premium Upper Receiver with Spring-Loaded Dust Cover and Forward Assist, Match Grade 24″ Stainless Steel 416R Medium Weight Tapered Contour 6.5 Grendel (Type II) Barrel with 1:7.8 Twist and 5R Rifling. Also included is a Rifle Length Stainless Steel Gas Tube with .750 Gas Block with Melonite Finish and a 19.25″ Free Float Slim Line MLOK Handguard. The MPI Tested Mil-Spec 6.5 Type 2 (.136) Nitride BCG includes proper depth Bolt head with Phosphate extractor, 5/8×24 Stainless Steel Tapered Fat Comp, and Sanders Armory Standard Charging Handle.