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[Mr Sir]

This is a proto that is kinda sorta built like a tank. My mission was to check out the idea of eliminating the air chamber exhaust valve and restrictive passages by means of sealing the chamber with a plastic disc. Ammo can be seen on picture where a side plate is off. (It is red with a pellet glued in place). So instead of just performing experiments on the bench, I decided to do a complete gun that would allow for changes and incorporate new ideas as they arose.
OA length = 36"
Weight = 7 1/4 Lbs
Barrel length = 17"
Pump stroke = 4 7/8' X 5/8 Dia
15 pumps gets a 14.3 Gr slightly domed pellet thru 1" pine board or 1/2" CDX plywood