Umarex / BCM Air and other VFC spec Gear boxes

Using HOP lever of G-SPEC type and expanding the HOP adjusting range

DDAB is a Red Micro Dot optic with on/off switch

Please note that this does not come with the hop-up nub

MECHBOX PRO CNC Aluminum Spring Guide for VFC Spec V2 Wadsn Umarex / BCM Air andMaximize your AEGs performance with a Mechbox Pro CNC Aluminum Spring Guide. Designed for ELITE Force Umarex BCM Air and other VFC spec Gear boxes, this spring guide has a reduced stem circumference, which will allow you to use various strength aftermarket springs to dial it your desired velocity. Features: Steel and aluminum construction Designed to reduce spring torsion Utilizes thrust bearing spacer to maximize capabilities of spring Reduced stem