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 SR-2 or Echo1 ASR, check out the MadBull Ultimate Tightbore Barrel.
Tighter bore increases FPS and provides enhanced accuracy. The hard anodized finish prevents scratching. This 455mm barrel is specifically cut to fit the Echo1 ASR sniper rifle and the Maruzen SR2 sniper rifle. Although the picture shows a standard AEG cut, this barrel will not fit AEGs, but will only fit the ASR.
If you're looking to get more velocity and accuracy out of your Echo1 ASR, this barrel is the only barrel designed specifically to fit your sniper rifle.