This new 6.01mm tightbore barrel from MadBull is constructed of 7075 Aircraft Alloy with a hard anodized finish. If you're looking for a tightbore barrel for your AEG and you want superior accuracy, check out the MadBull Ultimate Tightbore Barrel.
Tighter bore increases FPS and provides enhanced accuracy. The hard anodized finish prevents scratching. This 407mm tightbore barrel will fit the KWA M4, other extended barrel M4 AEGs, and many other carbine size airsoft guns.