I have started a few upgrades on my own Impact M4.
A bit of increase in plenum volume due to removing material from valve housing.
Quicker air flow to regulator gauge due to above modification.
Peek valve instead of delrin
Barrel holder.
A bit of increase in plenum volume due to removing material from valve housing.
Quicker air flow to regulator gauge due to above modification.
Peek valve instead of delrin
Barrel holder.