[PDI] Precision Cylinder Set HD for Tokyo Marui VSR-10

A balanced all-round set that takes into consideration initial velocity and durability.

[Precision Cylinder]
Ultra-precision cylinder "Precision" for VSR-10 that overturns conventional wisdom in the industry

●Inner diameter 22φ (genuine diameter) ●Inner diameter tolerance ±1/100mm ●SUS304 (stainless steel) ●Laser welding used ●Parallel pin used
These stainless steel cylinders are the same size (bore diameter) as the VSR stock cylinders. Instead of using standard stainless steel pipes, they are cold-forged for precision, achieving a bore diameter tolerance of ±1/100mm. This is the same precision as a typical custom inner barrel. This is the ultimate cylinder series, meticulously refined for wear resistance in bolt-action systems, where efficient piston acceleration and air ejection are key. *These cylinders are not compatible with stock pistons, springs, spring guides, or cylinder heads.

<Consideration of the connection point with the boss>
We pay close attention to the connection with the post body, which can be considered the neck of the custom cylinder.
While many cylinders use hollow split pins, we have determined that these do not offer the same level of durability, and have therefore adopted solid parallel pins. In addition, by welding the joints, we have created a cylinder that is tough enough to withstand repeated cocking over a long period of time.

[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, and by using SUS303 and tapering the interior at an optimal angle, we have achieved output conversion that is greater than that of a regular head. Fully compatible with PDI Hop-Up Chamber Ver.2.
*This product can be attached to the VSR-10 genuine cylinder, but it may not be able to lock securely due to shallow threads on the genuine cylinder. This is due to the fact that the screw part of the genuine cylinder is changed depending on the batch, so we cannot currently announce when the batch will be safe, and therefore we do not recommend using it on the genuine cylinder.

[HD (Hard) Piston]
The best-selling PDI piston from the APS series is now used in the VSR.
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.
In addition, this product is a highly airtight version that does not use a vacuum system, so it is widely used as a piston that produces a higher initial velocity than VC.
*VC can increase the flight distance, but it takes time to start to seal, which results in a difference in initial velocity compared to HD pistons.

*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 piston design was changed due to a lot change in January 2021.
Changes
- Piston head design change
- Piston body design change
There are no changes to the materials used.
-Although there have been design changes, manufacturer testing has confirmed that the initial velocity and other specifications are the same as before the design change.

[Spring guide]
The spring guide is a part that is susceptible to stress caused by the expansion and contraction of the spring when cocking, so a POM thrust ring is installed at the base to reduce the load directly applied to the guide base.
The entire stainless steel is machined to ensure high dimensional accuracy, and even the shaft is thoroughly polished to ensure smooth pump action.

*Please use end cap bolts that meet the standards sold by our company.
Marui genuine bolts are made to the original standard, so they have a smaller diameter than standard bolts. If you use them with a PDI cylinder, the threads may not fit. The VSR-10 compatible cap bolt standard is M4 x 12mm.
*This product cannot be used with the "VSR-10 BORE UP".
*This product is designed with a thick spring.
*The VSR-10 uses a special trigger system, so cocking may be difficult after installation. Please refer to here for more information.
*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:
#Tokyo Marui VSR-10
■Set contents: Precision cylinder, tapered cylinder head, spring guide, HD (hard) piston


※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.