Polycarbonate piston helical ASG Ultimate M170 compatible with Marui standard. It can be used together with helical gears.
The piston has 10 heat-treated steel teeth, in the extension of the polycarbonate teeth, which offers wear resistance.

The piston is made of durable polycarbonate, with steel teeth specially designed to withstand springs with speed ​​between M150 and M190, above these values ​​we do not guarantee the performance or durability of the piston.
The design and size of the piston makes it suitable for ULTIMATE gearboxes. The length has been adjusted to make perfect contact between the first tooth of the piston and the first pinion.

Features:
- Durability,
- Compatible for strong springs,
- Reduced friction,
- Compatible with Ultimate gearboxes,
- A perfect combination of materials, steel and polycarbonate, which reduces the impact and increases the strength of the components,
- Teeth aligned and cut for a perfect contact between pinion and piston,
- Suitable for power upgrades.

It is important that these parts work together with other internal components from ULTIMATE® brand to ensure performance and durability of the internal components.