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Just made a new air tank for it: 160 psi it can hold. Now the rifle shoots hard and far. Will test it against steel bb gun.
With the 0.5 liter bottle not far.The bicycle pump won't let the bottle be filled up beyond 2.5 bar.So i suggest using a schrader bike valve. It can handle a lot more pressure. Also use a bigger coke bottle. With these modifications it should reach anywhere between 20-30m. Maybe further.
Repeating bolt action airgu...View Instructable »