Inner barrel 6.03mm - 250mm (AKSU/M4 CQB)
SRC precission barrels brings good value and reasonable price. Made of brass and nickel-plated. It has smooth and hard surface. Rounded edges for HopUp rubber gives a greater pressure and better bullet rotation.
This barrel is suitable for all types of AEG guns, but also for gas guns. It has the notches for gas HopUp rubber of WE, KJW, or Marui.