You dont need to take the wood off the pump arm if your doing tunes or cleaning it. Upgrading the stock or stock work yes, you will
First, is thes a collectible gun?
If your still willing, take a drill bit that will fit thru the center of the drift pin, and drill thru out the side with no holes. Those two hoels will mark were you need to drill a hole the same size as your pins.
After the holes are drilled, drive out the pins. If possible, take the pump arm off the gun first, then drive the pins out. This way you dont beat the rest of the gun up from the impact
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