MadBull 6.03 tightbore barrel increases accuracy and velocity. This model fits M15 and M16s, CA8-2, G36, SAR models, and others by Echo1, Classic Army, Tokyo Marui, etc.
Mad Bull\\'s Black Python tightbore inner barrels are anodized aluminum and feature an inside diameter of 6.03mm. This tighter inside diameter and more consistent interior finish make the MadBull tightbore barrels significantly more accurate than stock airsoft rifle barrels.
The 509mm barrel fits most full length rifle AEGs, including the M16, G36, M249, and others.