Cobalt Kinetics CK Pro Lite 5.56 11.5" Barrel Upper Receiver

The Cobalt Kinetics CK Pro Lite 5.56 upper receiver assembly delivers precision engineering in a lightweight package designed for serious applications. This 11.5-inch barrel configuration strikes the optimal balance between maneuverability and ballistic performance for close to mid-range engagements.

What Makes This Different

Cobalt Kinetics builds their Pro Lite series with aircraft-grade aluminum construction and precision machining tolerances that exceed mil-spec standards. The 11.5-inch barrel length provides superior velocity retention compared to shorter configurations while maintaining the compact profile needed for dynamic shooting scenarios. Advanced gas system tuning ensures reliable cycling with both standard and match-grade ammunition.

Key Features

• 11.5-inch chrome-lined barrel with 1:7 twist rate for stabilizing heavy projectiles
• Forged 7075-T6 aluminum upper receiver with M4 feed ramps
• Mid-length gas system for reduced recoil and improved reliability
• Picatinny rail system compatible with standard optics and accessories
• Carbine-length gas tube with low-profile gas block
• 5.56 NATO chamber accepts both .223 Remington and 5.56 NATO cartridges
• Mil-spec barrel extension with proper headspace dimensions

Field testing demonstrates consistent sub-2 MOA accuracy with quality ammunition, making this upper suitable for law enforcement, competitive shooting, and precision applications. The mid-length gas system reduces port pressure and bolt velocity compared to carbine-length systems, extending component life and improving shooter comfort during extended firing sessions. Weather-resistant finishes protect against corrosion in harsh environmental conditions.

Technical Specs

• Barrel Length: 11.5 inches
• Caliber: 5.56 NATO/.223 Remington
• Twist Rate: 1:7 inches
• Gas System: Mid-length
• Upper Receiver: Forged 7075-T6 aluminum
• Barrel Material: Chrome-lined steel
• Thread Pitch: 1/2x28 TPI
• Overall Length: Approximately 18.5 inches
• Weight: 2.8-3.2 pounds (estimated)
• Finish: Type III hard coat anodizing

This upper receiver assembly represents proven engineering principles applied to modern manufacturing standards. Cobalt Kinetics' attention to dimensional consistency and material selection ensures reliable function across temperature extremes and firing schedules that would challenge lesser components.