S&T M1903 / M870 / Type 38 & 97 Series hop up rubber

Weight: Approx. 1g
Size: Total length: Approx. 15.6mm, Outer diameter: Approx. 10.0mm (excluding mounting protrusions), Nozzle inner diameter: Approx. φ6.0mm
Compatible with: S&T Type 38 and Type 97 series
*S&T M1903 and M870 series from the same production lot using the same shaped gasket

This is the original chamber gasket used in the S&T Type 38 rifle, Type 97 sniper rifle, (※1) M1903, and (※1) M870 series.
Use this to replace worn-out original gaskets.

The appearance is nearly identical to the Tokyo Marui VSR gasket, but the rear and nozzle inner diameter is narrowed (approx. φ6.0mm), so it cannot be used as a substitute for the original VSR gasket.

(※1)
It can be used with the recently produced M1903 and M870 series, but the position of the hop pin is slightly different on earlier production models, making it incompatible. (The general shape of this product is shown in Figure 1.)

*When assembling this product, be sure to measure the projectile velocity and adjust it to ensure it is within legal limits.