Prometheus Spring Guide Versions 2 & 8 Ninja Airsoft Fits in all M4 and

Fits in all M4 and M16 style airsoft AEGs

Mid-capacity Polymer Magazine for airsoft AEGs

1v 1000mAh Stick Lipo Battery (LiPo)

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

Prometheus Spring Guide Versions 2 & 8 Ninja Airsoft Fits in all M4 andThe 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.