M4A1 MWS Custom Inner Barrel 6.03 250mm

Inner diameter is designed with φ6.03mm with Precision ±0.01mm Tolerance! (TM Original is Φ6.08mm)
Designed with  length to improve airtightness
Solid BB stability and accuracy, made with enhanced stainless steel material!

■COMPATIBLE MODEL
GBB M4A1 MWS(TOKYO MARUI)
GBB TYPE89(TOKYO MARUI)

【NOTICE】
Please check the muzzle velocity of the airsoft after custom upgrades,
and follow the regulation according to your own country's legist ration, and field rules.