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Benjamin pump-up air rifle; How it works demonstration

I had an old ‘beater’ Benjamin 312, actually several, and so decided to sacrifice one to demonstrate the inner workings of this classic pneumatic air rifle. There are two videos, only to keep each within a 15 minute time frame. Most vintage and even modern pneumatic airguns operate in a similar manner, although the innards and specific mechanisms may differ substantially. I hope these videos are entertaining and informative.