Owners of Tokyo Marui M4A1 MWS Gas Blowback Rifle looking into upgrading their inner barrels can now check these newly released 6.15mm and 6.01mm (inner diameter) inner barrels from PDI and in stock at X-Fire. These have an 8.55m outer diameter with a tolerance of ±0.002mm and uses SUS304 Stainless Steel:

• "The increase in FPS and range are not proportional.Laser marking and engraving variations depends on the production lot.
• Although a non-magnetic austenitic material is used, magnetic force might be induced during the manufacturing process.
• In some rare cases, a thin striped pattern can be seen on the inner surface, but this does not affect performance."

6.15 INNER BARREL For Tokyo Marui M4A1 MWS (GBB)

6.01 INNER BARREL For Tokyo Marui M4A1 MWS (GBB)