Skip to Content

M4 UTAW Champion .223 Wylde 8″ Match Complete Upper Assembly



The M4 UTAW Champion Pistol upper is chambered in .223 Wylde so it accepts, chambers, and fires both .223 Remington and 5.56 NATO flawlessly. This upper assembly makes for one of the best AR pistols on the market and is equipped exclusively out of high-quality components. It is lightweight, accurate, and durable. We stand behind our name on every rifle and product manufactured. The Champion Series is the main platform used to showcase our bleeding edge technology and what we are capable of at U.S. Arms Company. This complete upper assembly is offered in .223 Wylde or .300 Blackout chambering.

The upper receiver is billet and constructed out of 7075-T6 aluminum and receives a Type III Hard Coat Anodize. The upper is then outfitted with a Radian Raptor charging handle and a Strike Industries polymer dust cover. The handguard is constructed out of 6061-T6 aluminum and is also Type III Hard Coat Anodized. The barrel installed in this weapon system is derived from a cold hammer forged 416R stainless match grade blank. At 8″ in length, this shorter barrel is great for a compact feel and small enough so it’s always secured in the right place of your home or vehicle. The barrel is turned, glass bead blasted, and equipped with a nickel boron barrel extension. As a result of using a nickel boron extension and a U.S. Arms nickel boron bolt carrier group, the shooter experiences extremely smooth cycling. To aid in the best shooting experience, the M4 UTAW Champion AR Pistol also comes standard with a state of the art gas system consisting of an SLR .750” adjustable titanium gas block along with an SLR pistol length Melonite gas tube. This allows the shooter to adjust gas flow according to the type of ammunition and suppressor combination being used. This pistol upper is suppressor ready straight out of the box.



Anodized Black


.223 Wylde



Gas System


Barrel Length


Barrel Profile


Muzzle Device

Strike Venom Flash Hider

Product Benefits

  • Designed and engineered to allow significant weight reduction without sacrificing strength.
  • Shoots MOA or less with match grade ammunition and proper rifle set up.
  • Machined to aerospace tolerances in a ISO certified aerospace facility.

Details and Build Materials

  • Upper Receiver Set: 7075-T6 aluminum by U.S. Arms Company (Includes Polymer Dust Cover by Strike Industries)
  • Bolt Carrier Group: U.S. Arms Nickel boron M16/4 full-auto, MP tested, with properly staked gas key
  • Charge Handle: Radian Raptor Ambidextrous
  • Handguard: 7.375″ aluminum free-floating with full-length or continuous top Picatinny rail system, side and top M-LOK slots, and side QD mount points
  • Barrel: U.S. Arms Cold Hammer Forged 416R stainless match blank, 6 groove, 1:7 twist, glass bead blasted, and a nickel boron extension
  • Gas System: SLR low profile titanium .750″ adjustable gas block and SLR pistol length Melonite gas tube
  • Muzzle Device: Strike Industries Venom flash hider
  • Sights: Not included

Reach out to for custom cerakote.