This USP Inner Barrel is crafted from carefully selected brass and features a proprietary "Teflon® Coating." The thickness of this coating is precisely controlled through electroplating within the hollow barrel, resulting in an exceptionally low inner diameter variation, maintaining a consistent 6.04 mm diameter. Compatible with USP Gas Blowback Pistol.
 
Material: Brass
Total length: 95mm
Outer diameter 8.5mm
Inner diameter 6.04mm
 
Hop Up Groove Processing
The precision required for Hop Up groove processing is exceptionally high. Unlike the more common method of using a lathe for end milling, we take the time and incur the cost to individually process each HOP groove using an immersion-type electric discharge machine, ensuring superior accuracy.
 
Teflon® Coat 
Teflon Coat is a specialized oating, enriched with various additives to enhance its properties. This coating offers excellent abrasion resistance and superior sliding characteristics, making it more durable than typical electroplating.
 
This coat is also resistant to dirt and easy to maintain, requiring minimal upkeep. Regular cleaning of the inner barrel with a maintenance rod will help maintain optimal performance, improving flight distance, bullet grouping, and stability.
 
Note: Please replace with care and when in doubt, use a professional service provider to complete the barrel replacement