[PDI] BORE UP Premier Cylinder Set HD for Tokyo Marui VSR-10

[BORE UP Premier Cylinder]

●Inner diameter 23φ (bore up) ●Inner diameter tolerance ±1/100mm ●SUS304 (stainless steel) ●Laser welding used ●Parallel pin used
This large-capacity stainless steel cylinder is one size larger than the VSR stock cylinder. The increased capacity allows for stable initial velocity even when using a low-rate spring.

[Tapered cylinder head]
This part determines how efficiently the air pushed out of the cylinder can be converted into output.
PDI places the same importance on the inner barrel and chamber, using SUS303 stainless steel and tapering the interior to an optimal angle to achieve greater power output than a standard head. Furthermore, extending the nozzle length optimizes the BB bullet holding position, resulting in stable power output. The O-ring at the tip of the nozzle is ideal for improving airtightness within the chamber, reducing air loss.

*This product can be attached to the VSR-10 genuine cylinder, but it may not be possible to lock it securely due to the shallowness of the screws on the genuine cylinder.
This is because the threads on the stock cylinders are changed depending on the batch, so we are unable to say when the batch will be safe. Therefore, we do not recommend using this product on stock cylinders.

[BORE UP HD (Hard) Piston]
It is divided into four parts, with the head and body made of durable aluminum alloy, the ring made of highly durable POM with excellent sliding properties as it comes into contact with the cylinder, and the rearmost part, which is the part that bears the most load on the sear, made of carbon steel. By using the right materials in the right places, we have created an ideal piston in terms of durability.

*Note: Regarding POM part colors:
Due to a shortage of raw materials (POM), it is becoming difficult to procure materials.
The color of the piston ring (POM) of the product you receive will be either white (POM) or black (POM) depending on the situation.

The design has changed from the November 2020 batch.
Changes
- Piston head design change
- Piston body design change
*There are no changes to the materials used.
*Although there has been a change in design, manufacturer testing has confirmed that the initial velocity and other specifications are the same as before the design change.

[Spring guide]
Since this part is susceptible to stress caused by the expansion and contraction of the spring when cocking, a POM thrust ring is installed at the base to reduce the load directly on the guide base. High dimensional accuracy is achieved through machined stainless steel, and even the shaft is thoroughly polished to achieve a smooth pump action.
This product is designed exclusively for HD (hard) pistons, so the shaft is longer than the VC guide.

*This product is designed with a thick spring.
*Since the VSR-10 uses a special trigger system, cocking may become difficult after installation.
*The BORE UP cylinder has larger inner and outer diameters, so if you are installing it on a genuine receiver, please remove the support ring inside the receiver before use. If you are using a PDI BORE UP receiver, the inner diameter has been optimized so you can use it as is.
*Cylinders, cylinder heads, etc. are modified and improved every certain period (lot), so it may be difficult to assemble parts from older lots together with the latest lot. This can be resolved by assembling parts from the latest lots together.

Specifications
■Compatible models:
#VSR-10BORE UP receiver only (Tokyo Marui VSR-10 only)
■Set contents: BORE UP Premier Cylinder, BORE UP Tapered Cylinder Head, BORE UP HD Piston, BORE UP Spring Guide


※please note※
If you have customized your airsoft gun or replaced parts, be sure to measure the bullet speed using a bullet speed meter to ensure it is within the legal limit (possession of bullets over 0.98 J is prohibited). Also, be careful not to exceed the legal limit during the work.