The Alexander Arms KIT6516 Upper Parts Kit delivers a complete 6.5 Grendel upgrade for AR-15 platforms, featuring a Mil-Spec flat top upper receiver with port door and forward assist installed, a 16" stainless steel barrel finished in Black Cerakote for rugged durability and corrosion resistance, and a precise 1:8 twist designed to stabilize a wide range of Grendel projectiles. This kit includes a complete bolt carrier and 6.5 Grendel bolt, a .875 gas block, a mid-length gas tube, and a Mil-Spec charging handle to ensure reliable cycling and smooth operation. Rounding out the package is an optic-ready upper arrangement and a single 10-round magazine, offering ready-to-shoot capability for varmint, deer, or target shooting applications. Note that while the kit provides the essential upper components and the high-quality 16" barrel, it does not include a barrel nut or handguard, giving builders the flexibility to pair with their preferred handguard system and compatibility hardware. With its Black Cerakote finish and robust stainless barrel, this upper parts kit from Alexander Arms is designed to maximize performance, accuracy, and reliability in a dedicated 6.5 Grendel build for serious shooters and hunters alike.