Stainless Steel Bull tightbore barrel 6.03 mm - 363 mm

New Stainless Steel 6.03 precision inner barrels 363mm for M4/SIG551/XM/249Pa. Madbull takes no short cuts in providing an immaculately finished inner barrel for increased precision and the highest standard of durability. Get the absolute most out of your airsoft rifle by purchasing Madbull’s new gorgeous Stainless Steel 6.03mm upgrade inner barrel.

• Immaculate stainless steel finish
• Increased precision
• Upgrade inner barrel
• Highest quality
• Strength and durability