Battle Arms Development WORKHORSE® 16″ Complete AR-15 Upper w/ RACK 15 C Charging Handle | .223 Wylde/5.56 NATO
The Battle Arms Development WORKHORSE® 16″ Complete AR-15 Upper is a premium ready-to-run upper receiver assembly engineered for shooters seeking dependable reliability, modern modularity, and enhanced component quality in a versatile AR-15 platform. Chambered in .223 Wylde and compatible with both 5.56 NATO and .223 Rem ammunition, this complete upper is purpose-built for defensive carbines, range rifles, training setups, and modern sporting rifle applications.
Built around a 16″ 4150 Chrome Moly Vanadium barrel with a durable nitride finish, the WORKHORSE® upper is designed to provide long-term durability, corrosion resistance, and reliable performance under demanding firing schedules. Shooters frequently search for 16″ AR-15 complete uppers because the 16-inch configuration offers an excellent balance of maneuverability, velocity, recoil control, and legal compliance without requiring NFA registration.
The .223 Wylde chamber provides the versatility to safely fire both 5.56 NATO and .223 Rem ammunition while maintaining enhanced accuracy potential compared to traditional 5.56 NATO chambers. Builders frequently search for .223 Wylde AR-15 uppers because the chamber design combines precision shooting capability with full-pressure 5.56 reliability across a broad range of ammunition types.
A carbine-length gas system paired with a WORKHORSE® low-profile gas block delivers dependable cycling performance and broad ammunition compatibility. The barrel features a versatile 1:8 twist rate capable of stabilizing a wide range of bullet weights commonly used in defensive, training, and precision-oriented AR-15 setups.
The included WORKHORSE® 15″ M-LOK® free float handguard provides modern modularity and improved accuracy potential while maintaining a slim ergonomic profile favored by today’s AR shooters. M-LOK® attachment slots allow direct mounting of weapon lights, bipods, sling mounts, hand stops, lasers, and other modern rifle accessories without unnecessary added bulk.
This configuration includes a complete M16-profile bolt carrier group featuring a black nitride 4150 CRMV carrier and a 9150 steel bolt engineered for reliable operation and long-term durability. A Battle Arms Development RACK™ 15 C ambidextrous charging handle is also included, providing smooth ambidextrous manipulation and enhanced durability for hard-use rifle applications.
The forged 7075-T6 upper receiver features hardcoat anodizing and M4 feed ramps for reliable feeding performance with modern ammunition profiles. An included A2 flash hider helps reduce visible muzzle flash while maintaining the lightweight handling characteristics favored in defensive and training carbines.
Whether building a duty rifle, defensive carbine, suppressor-ready setup, or versatile all-purpose AR-15, the Battle Arms Development WORKHORSE® 16″ Complete Upper delivers premium components, dependable reliability, and modern free float performance trusted by serious shooters and rifle builders alike.
Features:
- 16″ complete AR-15 upper assembly chambered in .223 Wylde
- Compatible with both 5.56 NATO and .223 Rem ammunition
- Includes complete bolt carrier group and ambidextrous charging handle
- Battle Arms Development RACK™ 15 C ambidextrous charging handle included
- 4150 Chrome Moly Vanadium barrel construction
- Nitride barrel finish for enhanced durability and corrosion resistance
- Carbine-length gas system
- 1:8 twist rate for broad projectile compatibility
- Forged 7075-T6 upper receiver
- WORKHORSE® 15″ M-LOK® free float handguard
- M16-profile black nitride bolt carrier group
- 9150 steel bolt assembly
- Low-profile gas block
- A2 flash hider with 1/2×28 muzzle threads
- Excellent for defensive, training, and all-purpose rifle builds
- Made in the USA
Specifications:
- Barrel Length: 16″
- Barrel Material: 4150 Chrome Moly Vanadium
- Barrel Finish: Nitride
- Chamber: .223 Wylde
- Twist Rate: 1:8
- Gas System: Carbine-Length
- Gas Block Diameter: .750
- Muzzle Threads: 1/2×28
- Handguard: WORKHORSE® 15″ M-LOK®
- Upper Receiver Material: Forged 7075-T6 Aluminum
- Bolt Steel: 9150
- Carrier Finish: Black Nitride
- Overall Length: 24.875″
Product Information
| Product Type | Upper Receiver, Complete Upper |
|---|---|
| Material | 4150 Chrome Moly Vanadium, 7075-T6 Aluminum |
| Gas System | Rifle |
| Muzzle Thread | 1/2×28 |
| Handguard | 15" M-LOK |
| Series | Workhorse |
| Manufacturer | Battlearms Development |
| Platform | AR15 |
| Color | Black |
| Finish | Anodized |
| Caliber | 223 Wylde, 5.56 NATO |
| Length | 16" |
| Twist Rate | 1:8 |
| Barrel Finish | QPQ Nitride |
| Compatibility | Standard AR15 components |
| Made in USA | Yes |
