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DYE UL-I Barrel Insert System Accuracy DYE-versified. The new DYE UL-I Barrel Insert System has reset the standard for accuracy and quality. The UL-I is THE upgrade for paintball markers...
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Free Shipping

Free standard shipping on orders over $150


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Free Returns

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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

DYE UL-I Barrel Insert System

Accuracy DYE-versified. The new DYE UL-I Barrel Insert System has reset the standard for accuracy and quality. The UL-I is THE upgrade for paintball markers and offers unparalleled versatility and performance. The extended 8.5” control bore utilizes multi-stage precision honing and boasts the most accurate and consistent finish available in paintball. The self-aligning three-piece construction ensures properly centered assembly between barrel back, barrel tip and insert. Our trademarked muzzle brake boasts progressive porting and optimized harmonics and an ultra-quiet sound signature that is aesthetically pleasing. Designed and refined by DYE Precision, the leading manufacturer in barrels for the paintball industry, this barrel insert system allows players to easily switch between different bore sizes to match their paintballs and optimize accuracy and efficiency on the field.

Whether you're a tournament player seeking ultimate accuracy or a recreational player looking to improve your performance, the UL-I Barrel Insert System is an essential upgrade that will elevate your paintball experience to new heights. Experience the precision, versatility and reliability that DYE Precision is renowned for with the new innovative UL-I Barrel Insert System.


Key Features:

  1. Interchangeable Bore Inserts: The DYE UL-I Barrel Insert System offers a set of 9 bore inserts with various diameters ranging from .676 to .692. These inserts can be easily swapped within the UL-I barrel system, allowing players to quickly adapt to different paintball sizes and achieve the best possible barrel-to-paintball match. Compatible with barrels that accept the PWR insert system.
  2. Precision-Machined Construction: Each bore insert and barrel component is meticulously machined from high-quality materials to ensure exceptional durability and consistency. The precise tolerances guarantee a tight fit between the insert and the barrel, minimizing air leakage, and maximizing shot consistency.
  3. Enhanced Accuracy: By using the appropriate bore size for the paintballs being used, the DYE UL-I Insert Barrel System significantly improves accuracy. A proper match between the paintball and barrel diameter reduces air turbulence and ensures a straighter trajectory, resulting in more precise shots and increased hit rates.
  4. Air Efficiency: With the ability to fine-tune the bore size, players can achieve optimal air efficiency. The right barrel-to-paintball match minimizes wasted air and ensures consistent velocity, allowing for increased shots per air tank fill.
  5. Quick and Toolless Insert Changes: Switching between different bore inserts is quick and hassle-free, thanks to the toolless design of the DYE UL-I Barrel Insert System. Simply unscrew the barrel from the marker, remove the current insert, and insert the desired one. The secure locking mechanism ensures a snug fit.
  6. Compatibility: The DYE UL-I Barrel Insert System is compatible with a wide range of popular “autococker” threaded paintball markers on the market. It comes in different lengths and threading options to accommodate various personal preferences.


  • 8.5 Inch Control Bore
  • Progressive Porting
  • Ultra-quiet Sound Signature
  • Optimized Harmonics
  • Precision Multi-stage Honing
  • Self-centering 3 Piece Design
  • Slip Fit, Self-clamping Design
  • Superior Accuracy
  • Autococker Quick Threads (barrel back)
  • Multiple Insert Bore Sizes
  • Insert Compatibility: UL-I, *PWR Systems
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