Dye Boomstick UL-I Barrel Back - Black Polished

The DYE UL-I Barrel Insert System has reset the standard for accuracy, versatility, and performance.

The UL-I’s extended 8.5” control bore uses multi-stage precision honing for unmatched consistency. A self-aligning three-piece design ensures perfect centering between the barrel back, insert, and tip. The signature muzzle brake delivers progressive porting, optimized harmonics, and an ultra-quiet shot.

Compatible with the PWR insert system, this insert-ready barrel back gives tournament and recreational players the edge they need to dominate on the field.

Key Features:

• Interchangeable Inserts: Compatible with 9 bore sizes (.676–.692)
• Precision-Machined Fit: Ultra-consistent, air-tight insert seating
• Superior Accuracy: Perfect paint-to-barrel match for cleaner shots
• Air Efficiency: Optimized bore = more shots per tank
• Toolless Changes: Fast insert swaps with a self-clamping design
• Autococker Threaded: Fits most major markers