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A tight design with an inner diameter of 6.03 mm, excellent abrasion resistance, dirt resistance, and a low-priced inner barrel series with a "HV500 coat" that maintains a beautiful surface, the second GUREN series!
Guren "2" aims to produce professional use barrels using iron.
The material and coating are the same as the Guren 1 "HV500 coat".
The treatment on the muzzle side has been upgraded from Guren 1's "chamfering" to "tapering". "Tapering" efficiently discharges air and converts it into energy that pushes bullets, while creating rectification and increasing accuracy.

The 6.03mm inner diameter is a tight barrel design that makes it easy to increase the muzzle velocity.
Since the inner diameter is 6.03mm, which is a tight setting, you can expect an improvement in muzzle velocity just by replacing the barrel.
The product is made of iron. Unlike stainless steel, due to tolerances, the inner diameter of 6.03 mm is the limit of tight design.
Anything tighter than this will cause bullet jams.

We have devised a special design for gas blowback barrels to accommodate various variations.
A 45 degree chamfer is added to prevent damage to the hop packing.