The Battle Arms WORKHORSE C 16 Inch 5.56 Complete Upper, Ambi, Black (Battle Arms Development part number WH-UR16B-Y-15C) is the C configuration of Battle Arms Development’s WORKHORSE upper line, built around the same forged WORKHORSE 7075-T6 aircraft-grade aluminum receiver. Battle Arms Development pairs that receiver with a free-float rail handguard carrying M-LOK attachment points at the 3, 6, and 9 o’clock positions, plus a full-length Picatinny rail at 12 o’clock with the signature notch cut that matches the upper receiver. This upper ships with a 4150 chrome-moly steel barrel in a black nitride finish for durability and accuracy, individually head-spaced to a matching 9310 steel bolt and 8620 black nitride carrier. At 16 inches, the barrel clears the federal rifle-length minimum, and this upper does not include a lower receiver.

Key Specifications

• Chambered in .223 Remington/5.56 NATO.
• Barrel measures 16 inches, the C configuration of the WORKHORSE line.
• Receiver is forged WORKHORSE 7075-T6 aluminum.
• Barrel is 4150 chrome-moly steel with a black nitride finish.
• Includes a matched 9310 steel bolt and 8620 black nitride carrier.
• The barrel is individually head-spaced to its matched bolt for tight, reliable tolerances.
• Free-float handguard offers M-LOK attachment at 3, 6, and 9 o’clock.
• Includes a full-length Picatinny rail at 12 o’clock with a signature notch cut matching the upper receiver.
• Classified as an Upper, sold without a lower receiver.

Frequently Asked Questions

How does the C configuration differ from the standard WORKHORSE? Both share the same forged ambi receiver, barrel, and BCG specifications; this listing is the C configuration within that line.

Does this upper require any special paperwork? No, at 16 inches the barrel clears the federal rifle-length minimum, and the upper ships without a lower receiver.

Buy the Battle Arms WORKHORSE C 16 Inch Upper

Complete your AR-15 build with the Battle Arms WORKHORSE C, a forged ambi upper ready to run. Order it from our Battle Arms Development lineup of AR15 uppers and our Lubbock, Texas team will get your order ready to ship as soon as it’s available.