For owners of the Tokyo Marui VSR-10 or compatible clones, the PDI BORE UP Premier Palsonite Cylinder Head Set offers a significant internal upgrade designed for high-end performance. Constructed from durable SUS304 stainless steel with a precise inner diameter tolerance of $\pm 0.01\text{mm}$, this cylinder features a specialized Palsonite finish to drastically reduce friction between the piston and the cylinder walls. This surface treatment, combined with an increased internal diameter of 23mm, allows the piston to achieve higher travel speeds and more consistent compression, resulting in a smoother bolt pull and exceptionally stable power output.

The included cylinder head is CNC-machined from SUS303 stainless steel and features a tapered rear profile specifically engineered to optimize airflow. It is important to note that this set is exclusively compatible with Bore Up cylinders and the HOP UP Chamber Ver. 2; it will not fit original factory cylinders or the Ver. 1 chamber. By utilizing laser-welded construction reinforced with parallel pins, this set provides the structural integrity required for high-stress builds, making it an ideal choice for players seeking a reliable, high-power sniper platform.