The EG Barrel [363mm] for HK417, SOPMOD, M4A1, SR16, SG551 series features a highly precise inner diameter of 6.03mm with a dimensional tolerance of 0.01mm. The barrels are made from carefully selected materials that provide the necessary strength to maintain this level of precision. Unnecessary coatings are eliminated, ensuring that every factor contributing to accurate BB impact on target is fully optimized.
 
Inner Barrels: The Key to Accuracy
 
While a real firearm's barrel is a single metal tube, an airsoft gun's barrel consists of two parts: the outer barrel, which replicates the look of a real firearm, and the inner barrel, which actually accelerates the BBs. The precision of the inner barrel plays a crucial role in determining an airsoft gun's accuracy and muzzle velocity, making it one of the most critical components.
 
Most Tokyo Marui electric guns have a standardized inner barrel specification (on the feed side). The EG Barrel series is compatible with these standards, allowing users to choose from a range of barrel lengths to suit different outer barrels or custom setups.
 
Compatible with:
- Tokyo Marui HK417
- Tokyo Marui M4 SOPMOD
- Tokyo Marui M4A1
- Tokyo Marui SR16
- Tokyo Marui SG551
 
Specifications:
- Inner Diameter: 6.03mm  
- Outer Diameter: 8.5mm  
 
Material:  
- Stainless Steel (SUS)
- Made in Japan
 
Caution:  
After customizing your airsoft gun, always perform a Joule and velocity check. Under Japanese law, any gun exceeding the legal limit of 0.989 Joules is subject to penalties. Note that measured values can vary due to factors such as season, time of day, hop adjustment, and gun characteristics. Ensure your airsoft gun operates within a safe margin of the Joule limit.