The Battle Arms Development Workhorse 16-Inch AR-15 Upper (brand part no. WH-UR-16-556) is a complete upper assembly in 5.56 NATO built by a company that’s made its name pushing the boundaries of small arms design since 2009. Founded in Henderson, Nevada, Battle Arms Development builds this Workhorse upper with a 16-inch barrel, which clears the federal minimum rifle barrel length with room to spare, and an M-LOK handguard for mounting lights, grips, and other accessories. This listing is for the upper assembly without a bolt carrier group, so builders who already have a BCG on hand, or who want to pick a specific BCG coating separately, can save on a duplicate purchase. As an upper receiver assembly, it is not itself a complete firearm and requires a compatible AR-15 lower to build a functioning rifle.

Key Specifications

• Chambered in .223 Remington/5.56 NATO.
• 16-inch barrel length, clearing the federal rifle minimum.
• Features an M-LOK handguard for accessory mounting.
• Sold as a complete upper assembly, without a bolt carrier group.
• Part of the Workhorse upper lineup.

Frequently Asked Questions

Does this upper include a bolt carrier group? No, this listing is for the upper assembly only; a BCG is not included and must be purchased separately.

Do I need a lower receiver to use this upper? Yes, an upper assembly alone is not a complete firearm and requires a compatible AR-15 lower receiver to build a functioning rifle.

What handguard system does this upper use? It uses an M-LOK handguard for mounting lights, grips, and other accessories.

Buy the Battle Arms Development Workhorse 16-Inch AR-15 Upper

Order it from our Lubbock, Texas gun shop for fast, direct shipping to your door, and build out your next AR-15 with a proven Workhorse upper.

Shop more from Battle Arms Development and browse our full AR15 uppers selection.