rare revolver?

Is this rare? Never saw a crosman with a co2 on the barrel 
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What's rare is finding one with the CO2 cover still intact. Just guessing, that's looks like an early 70's SA6 or Peacemaker 44 in .22 you have there. 

This one is a later 70's Peacemaker in .177 has a plastic cylinder as opposed to the metal cylinder the early 70's models came with, this one has the CO2 cover still on it. They're a lot of fun, I pick them up here and there when someone's practically giving one away and it's in good shape, with a box is a big plus.

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