TRIARC Systems Assembled Upper Receiver 8.3" .300 Blackout - Coyote Tan (HIR-235)

TRIARC Systems Assembled Upper Receiver 8.3" .300 Blackout - Coyote Tan (HIR-235)

Engineered for performance and built from premium materials, the TRIARC Systems 8.3” 300 Blackout Upper Receiver Group is a short-barreled powerhouse that blends precision machining, rigid durability, and clean design into one compact fighting upper. Featuring the TRACK™ 2.0 CrMoV barrel and a low-profile pinned gas block, this system excels in suppressed and unsuppressed configurations. Whether you’re building a PDW for maneuverability or a suppressed rig for stealth, this upper delivers professional-grade consistency and reliability.

8.3" TRACK™ 2.0 Barrel (CrMoV)
Straight-balanced contour, Black Nitride finish, 1:7 twist

4150V B-1159E Mil-Spec Steel
Inert gas heat treated for durability and longevity

NP3-Coated Barrel Extension
Reduces friction and improves reliability

TRILOK Wedge Lock Handguard
7" 7-sided M-LOK with superior rigidity and accessory mounting

TSR-15S Forged Upper Receiver
Mil-spec upper with tight tolerances and robust construction

Pinned Low-Profile Gas Block
TRIARC's own design, .750″ Diameter Journal w/ 1″ Length

Pistol-Length Gas System
Optimized for reliable cycling with 300BLK, especially suppressed

Threaded Muzzle (5/8x24)
Ready for your preferred muzzle device or suppressor mount

Coyote Tan Finish
HIR-235, offers signature management and
camouflage against 3rd Generation Night Vision. This coating was engineered for LEO and Military
applications

Specifications

• Caliber: 300 Blackout
• Barrel Length: 8.3"
• Twist Rate: 1:7
• Barrel Profile: TRACK™ 2.0 Straight-Balanced
• Barrel Material: 4150V CrMoV (Mil-Spec B-1159E)
• Barrel Treatment: Inert Gas Heat-Treated, Black Nitride
• Extension Coating: NP3
• Gas System: Pistol-Length
• Gas Block Journal: .750" diameter, 1" length
• Gas Block: TRIARC Low-Profile (pinned)
• Muzzle Threads: 5/8x24 (No muzzle device included)
• Handguard: 7" TRILOK Wedge Lock M-LOK
• Upper Receiver: TSR-15S Forged Mil-Spec
• Finish: Coyote Tan Cerakote (HIR-235)
  
• Weight (Barrel Only): 16 oz

*This complete upper receiver group is sold without a Bolt Carrier Group (BCG) or Charging Handle.