Whether your looking to build a custom Gearbox from scratch of give your tired AEG a new lease on life depend on Modify parts.

Bore-Up Ported Piston Head

Bore-Up Double O-ring Cylinder Head

Bore-Up Smooth Bore Cylinder

Reinforced Piston

Air Nozzle with O-ring seal

M130 Spring

Ball Bearing Spring Guide

Metal Bushings

Anti-reverse Latch

Reinforced Tappet Plate

Synthetic Lubricant

We highly recommend professional installation unless you are familiar with the internal upgrade process