Madbull Airsoft 363mm 6.01mm Ultimate Tight Bore Barrel for M4A1 / SR16
Madbull Airsoft 363mm Ultimate Tight Bore BarrelBy using a hard coating process, their barrels can provide the smoothest inner barrel surface and a reinforced structure possible. The choice of B.B.'s is very important, use high grade BB's to ensure a longer lasting product. The barrels are 6.01mm in diameter.Features: