The 13xx series guns are a different family from the 2240. Different body diameter, parts don't interchange. The 13XX guns descend from the same line as the 760 pump rifle, While the 2240 is more a descendant of the 150/160 series CO2 guns.
Crosman built a LOT of variations of both rifles and pistols on essentially the same parts bins, with minor changes along the way, starting right about the post WW2 years.
Hard to beat the pump guns for cheap backyard shooting! One or two pumps and go! Pretty quiet too, comparatively.
The power output (and noise) of the 2240 can be dialed back with a lighter hammer or lighter hammer spring.
Some of the older models had adjuster screws that allowed you to change the preload on the spring, and a few models also had two click cocking, with the first click being considerably less power than the second.
It's a pretty interesting rabbit hole to go down! LOL! And they can become a strange addiction.
I really like Crosman guns! Lots of worse things to be doing than to be playing around with toys that make ya happy, eh?