Prometheus Spring Guide Versions 2 & 8 Ninja Airsoft This is the original style

This is the original style 45 degree piston

KWA KMP9 NS2 Series Breech Base

It allows equal comfort for

412mm inner barrel length which is quite long for such a compact AEG

Prometheus Spring Guide Versions 2 & 8 Ninja Airsoft This is the original styleThe Prometheus spring guide for ver. 2 gearboxes is a necessary upgrade for those looking to upgrade their version 3 AEG. The spring guide features hardened steel ball bearings at it's base that allows the spring to rotate more freely inside the gearbox, this releases tension that may build up in the spring, reduces the risk of spring breakage, and allows the motor to run more efficiently.