Not a "real" gun, but I put one of
these on my
Crossman model 1377 pellet pistol. That thing is now ACCURATE! I can easily hit sparrow sized targets at 50 yards or more...
Sometime in the distant past I had that same Crosman. It had a removable shoulder stock that replaced the grips. You are correct, it was a great little air gun. Wish I still had it.
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I do the things that I must, and really regret, are unfortunately necessary.
RIP OBG