extent of my mods are 1377 , 16.5 inch barrel (just a random measurement guess looks good ) steel breach . Crossman butt . almost any 7 year old can pump it 4 times and shoot 10 yard bullseye's . Or me too for that matter .
P.S. 1992 1377 still shoots great .
P.S. 1992 1377 still shoots great .
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