Prometheus AK74MN + PSG-1 POM Piston Head

POM piston head for the Ver.4 and Ver.9 gearbox

This Prometheus piston head is made for the Ver.4 and Ver.9 gearbox as used in the AK74MN and the PSG-1. It replaces the stock piston head and improves how the compression unit works together.

Construction and accessories

The piston head is made of POM, which raises durability over the stock part and keeps it sliding smoothly in the cylinder. On the spring side sits a newly specified bearing that lets the spring rotate freely. Contents: 1 piston head.

Highlights

• POM raises durability over the stock piston head
• Newly specified bearing for the spring
• Fits the Ver.4 and Ver.9 gearbox