The Battle Arms WORKHORSE 10.5 Inch 5.56 Upper, Black, No BCG (Battle Arms Development part number WH556-UA-10.5-223-BLK) is a complete upper receiver assembly built around Battle Arms Development’s WORKHORSE free-float handguard system. Battle Arms Development, established in 2009 in Henderson, Nevada, built its reputation as a distinguished force in small arms innovation, and the WORKHORSE upper reflects that same focus on design and manufacturing quality. This upper ships with a 10.5-inch, .223 Remington/5.56 NATO barrel and an M-LOK free-float handguard, but does not include a bolt carrier group, so the buyer supplies or reuses their own. Because this is an upper receiver group with no lower included, it is not itself a regulated firearm; pairing a sub-16-inch upper like this with a shouldered, rifle-configured lower without proper registration would create an unregistered short-barreled rifle, so buyers should confirm their lower configuration before assembly.

Key Specifications

• Chambered in .223 Remington/5.56 NATO.
• Barrel measures 10.5 inches in length.
• Classified as a Free Float upper design.
• Handguard uses an M-Lok attachment system.
• Part of Battle Arms Development’s WORKHORSE upper line.
• Ships without a bolt carrier group, so the buyer supplies their own.
• Finished in black.

Frequently Asked Questions

Does this upper include a BCG? No, this listing ships without a bolt carrier group.

Is this upper itself a regulated NFA item? No, an upper receiver group with no lower included is not itself a regulated firearm; pairing it with a shouldered, rifle-configured lower without proper registration would create an unregistered SBR, so confirm your lower configuration first.

Buy the Battle Arms WORKHORSE 10.5 Inch 5.56 Upper

Build out your next AR-15 pistol or SBR project with the Battle Arms WORKHORSE 10.5-inch upper. Order it from our Battle Arms Development lineup of other gun accessories and parts and our Lubbock, Texas team will get it shipped out quickly.