MadBull 6.03 650mm Tightbore Inner Barrel

MadBull 6.03 tightbore barrel increases accuracy and velocity.  This model is designed to fit in custom airsoft rifles and those with external silencers or very long barrels. For instance a KWA M16A4 KM16BR in conjunction with the JBU 6.75 inch  MSS Suppressor Long Version.

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