TRIARC Systems TSR-15S Upper Receiver Assembly - 5.56 NATO 12.5" TRACK 2.0 Barrel - HIR-265 FDE Non-IR Cerakote

TRIARC Systems TSR-15S Upper Receiver Assembly - 5.56 NATO
12.5" TRACK 2.0 Barrel - HIR-265 FDE Non-IR Cerakote

Designed around TRIARC Systems’ proprietary technologies, the TSR-15S URA is purpose-built to enhance accuracy, optimize gas efficiency, and extend component life under hard use conditions.

At the heart of the system is the 12.5" TRACK™ 2.0 barrel — a proprietary rifling design engineered to create a tighter seal around the projectile for optimized gas pressure, increased efficiency, and sub-MOA capable accuracy. Combined with a balanced mid-length gas system, the TSR-15S provides smoother cycling, reduced felt recoil, and minimized wear on internal components for long-term dependability.

The proprietary 11.5" TRILOK wedge lock handguard delivers exceptional rigidity and a stable 7-sided M-LOK mounting platform, allowing shooters to configure accessories with confidence while maintaining a streamlined profile. Precision-machined from Mil-Spec 7075 forged aluminum and finished with advanced Cerakote Gen II coatings, this upper assembly is engineered to withstand harsh operational environments while maintaining low visual and near-infrared signature characteristics.

Premium details such as the pinned TRIARC low-profile gas block, black nitride barrel finish, and NP3-coated barrel extension further reinforce the TSR-15S URA’s reputation for reliability and hard-use performance. Whether used for tactical applications, duty setups, training, or precision-focused rifle builds, this upper receiver assembly delivers the performance edge serious end-users demand.

TRACK™ 2.0 Barrel Technology
Proprietary rifling design improves gas seal efficiency for enhanced accuracy and consistent ballistic performance.

Balanced Mid-Length Gas System
Optimized gas port sizing reduces felt recoil and minimizes component wear for smoother operation.

TRILOK Wedge Lock Handguard
Rigid locking system enhances durability and maintains a stable accessory mounting platform.

7-Sided M-LOK Compatibility
Extensive accessory mounting options provide maximum flexibility for tactical and professional setups.

4150V CrMoV Steel Barrel Construction
Mil-Spec Chromium-Molybdenum-Vanadium steel delivers superior durability and heat resistance.

NP3-Coated Barrel Extension
Enhanced lubricity and corrosion resistance support reliable cycling performance.

Pinned TRIARC Gas Block
Secure low-profile gas block design enhances reliability under heavy use.

7075 Forged Aluminum Upper Receiver
Lightweight yet exceptionally strong Mil-Spec receiver construction.

Advanced Cerakote Gen II Finish Options
Optional non-IR reflective coating designed for military-grade signature management and durability.

Specifications

• Caliber: 5.56 NATO
• Barrel Length: 12.5"
• Muzzle Thread Pitch: 1/2 x 28
• Twist Rate: 1:7
• Muzzle Device Included: None
• Barrel Profile: TRACK™ 2.0 Straight Balanced Contour
• Barrel Material: 4150V Mil-Spec B-1159E Chromium-Molybdenum-Vanadium (CrMoV) steel
• Barrel Finish: High Temp Cerakote C-246
• Barrel Extension Coating: NP3
• Gas System Length: Mid-Length
• Gas Port Tuning: Optimized balanced gas system
• Gas Block Type: TRIARC Low Profile Gas Block (Pinned)
• Gas Block Diameter: .750"
• Gas Block Journal Length: 1"
• Gas Block Finish: High Temp Cerakote C-246
• Handguard Length: 11.5"
• Handguard Type: TRILOK Wedge Lock 7-Sided M-LOK
• Upper Receiver Material: 7075 Forged Aluminum
• Upper Receiver Specification: Mil-Spec
• Finish: Cerakote HIR-265 FDE, Non-IR reflective Cerakote Gen II
• URA Weight: 3 lb 1.5 oz

*Note: Upper receiver assembly does not include BCG, Charging Handle or Muzzle Device.