|  Matrix 6.03mm Teflon Coated 370mm Tight Bore Precision . -Increase accuracy -Increase grouping -Increase F.P.S. by approximately 5~20 F.P.S. depending on barrel length-Tight bore barrels reduces air leak inside the barrel for maximum accuracy and power, but high quality precision bbs must be used. (Marui, Excel or Matrix recommended) |