TTI - 6.03mm 300mm Inner Barrel GBB Cut Chronograph With the highest tolerance currently

With the highest tolerance currently available

Titanium Nitride (TiN) treated finish for greatly improved durability and smoother operation

For Tokyo Marui M4 MWS Airsoft Gas Blowback Rifles

CowCow CHAMP Sear Spring Black - Product Information

TTI - 6.03mm 300mm Inner Barrel GBB Cut Chronograph With the highest tolerance currentlyTTI 6. 03mm 300mm Inner Barrel The TTI 6. 03mm 300mm Inner Barrel is a precision tight bore upgrade barrel, GBB cut for gas blowback pistols and carbine kits. Machined to a true 6. 03mm internal diameter, it tightens the air seal around the BB to deliver improved accuracy, range and shot to shot consistency over a standard bore barrel. The 300mm length suits longer GBB platforms and carbine conversion kits, making it an easy drop in performance