Maxx Model Hop Up Chamber M4A- PRO Red gearbox They will always be lightweight

They will always be lightweight but rock solid with no body wobble

Better vision = Better Experience

The tension of the spring can be adjusted to further fine tune your results

Perfect fitment

as you tighten the screw the brass piece will be pressed into its final position

Maxx Model Hop Up Chamber M4A- PRO Red gearbox They will always be lightweightThis is the newest offering from Maxx Model. The M4A Pro edition is designed for AEGs. 21mm 21. 25mm Nozzles are recommended for this unit. CNC Aluminum Hopup Chamber M4A Pro (with BB Latching System) unit is precisely machined to perform accurately and consistently on Tokyo Marui , including G&G, Kryatc, NOT KWA. Standard M4 M16 AEG series. The Hopup Chamber M4A unit is built with an aluminum Rotary Dial Knob for fine hopup adjustments, the precision