[da Vinci Custom] 01 Raizen CA870 Compatible Inner Barrel 230mm

*Please note that this item is made to order and will take approximately 1-2 weeks to be shipped after your order is placed.

Raizen 01 Inner Barrel
Inner diameter 6.01mm
Outer diameter 8.55mm (hop section 8mm)
SUS304

CA870 Sawed-off, Charger, Bulldog compatible 230mm

*This product is developed based on the Charger variable hop model available in 2022.
Fixed hop and old variable hop are not supported.

The industry's highest quality SUS304 barrel, the "Raizen" series
The Raizen barrel is made from the ultra-precision material "SUS304" produced using Japan's proud semi-conductor manufacturing technology.
Da Vinci's unique surface roughness setting, with a tolerance of ±0.005mm, was achieved through collaboration with a company headquartered in Tokyo.
For machining, we use Star Micronics multi-tasking machines - 8 axes (X, Y, Z1, A, B, C, E, Z2) - and use the optimal tools to cut and reproduce the drawings down to the smallest detail. For the finishing polishing, we use machines and craftsmen in a system that does not allow for any compromise, resulting in a quality that cannot be imitated by other companies.

Ultra-tight setting "6.01mm" for excellent initial velocity
The basic concept is that the smaller the clearance between the inner diameter and the bullet, the greater the pressure from the rear, and the higher the muzzle velocity (the faster the bullet flies).
The 6.01mm inner diameter is calculated to maximize the clearance for 6mm BB bullets, allowing for maximum pressure. However, due to the ultra-tight setting, it is designed for precision bullets. There is a possibility of jamming with inferior bullets.

Special tapered processing for improved performance <br>The muzzle has been tapered, just like the Guren 2. The tapered processing efficiently expels air and converts it into energy that pushes the bullet out, while also creating a straightened airflow and improving accuracy.

Easy-to-install barrel without snap ring
Snap rings are essential parts that determine various positions when setting up the stock engine, but they are prone to breakage when removing or assembling, and we felt that they were difficult to work with on the da Vinci. The da Vinci barrel has an outer diameter of 8.55mm, so by stripping the hop section to 8mm, a natural stopper is created, resulting in an inner barrel that does not require a snap ring.

The positional relationship after assembly is also firmly determined.

*There is a groove on the outer circumference similar to the genuine one, but this is a step to counter the nose R of the lathe's outer diameter bit tip.
Please be careful not to make a mistake as the groove width and depth are not compatible with genuine snap rings.

Tough barrel with an outer diameter of 8.55 mm that is resistant to vibration
While the original CA870 barrel has an outer diameter of 8mm, this barrel has an outer diameter of 8.55mm.
The original inner barrel guide cannot be used, so it must be removed.
We recommend using a da Vinci barrel guide .
It is possible to shoot by simply removing the stock guide, but since the chamber only includes the inner barrel, the barrel will be facing forward.
Please use the da VInci barrel guide to center the inner barrel.
*Not included with this product, please purchase separately.

At Raizen, we have established an internal diameter inspection point "after polishing" as an inspection standard .
In particular, we physically check to see if any burrs generated during processing have affected the inner diameter.
The polishing is then checked again by the "human eye" of a select few craftsmen in charge of polishing.
Up to this point, the items are the same as those for Guren, but the surface roughness pass criteria are one level stricter, and roughness that occurs in the material is strictly selected.
The reason why Raizen is a high-end barrel is not only the cost of the materials, but also the time it takes to select them and the amount of rejected material.
Therefore, the bottle you receive will be a carefully selected item.

Regarding patterns (cutter marks, blade marks, etc.) that occur during processing and do not affect use,
After going through the above checks, the craftsman has given his permission, so please use it with confidence.