Description

The WORKHORSE AR15/M4 10.5" Complete Upper Receiver delivers unmatched reliability and precision performance in a compact configuration. Featuring a 10.5-inch .223 Wylde barrel, M-LOK® free-float handguard, and forged 7075-T6 aluminum receiver, this upper is engineered for demanding applications. Perfect for pistol or SBR builds, this upper combines durability, accuracy, and lightweight handling — built to the same standards trusted by professionals worldwide.

Specifications

SKU: WH-UR-10.5-223
Barcode: 810033783784
Barrel Length: 10.5 inches
Gas System: Carbine
Barrel Profile: A2
Barrel Steel: 4150 Chrome-Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 1/2x28
Chamber: .223 Wylde (accepts .223 Rem & 5.56 NATO)
Twist Rate: 1:8
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: WORKHORSE® Low Profile
Muzzle Device: A2 Flash Hider
Receiver Material: Forged 7075-T6 Aluminum
Receiver Type: M4 Flat Top
Handguard Type: WORKHORSE® 9.5" M-LOK® Free Float Rail
Bolt Carrier Group Included: No
Bolt Steel: N/A
Bolt Carrier Profile: N/A
Charging Handle Included: No
Overall Length: 18.5 inches

**This Upper Does Not Include a Bolt Carrier Group (BCG) or Charging Handle.**

Features

10.5" .223 Wylde chamber — optimized for accuracy with both .223 Rem and 5.56 NATO
Forged 7075-T6 aluminum upper receiver with M4 feed ramps
WORKHORSE® low-profile gas block and 9.5" M-LOK® free-float handguard
Carbine-length gas system for smooth, reliable cycling
A2 flash hider for

*Specifications subject to change based on availability.