Stone I am gonna go out on a limb here and assume that "crackbarrel" is cajunspeak for a break action single shot?

If so, then there are plenty of alternatives on the market that would allow you to mount a scope on that "crackbarrel". Most of them are a one piece design that simply bolt atop the barrel (assuming it is tapped) and you then usually mount the scope with a Weaver type set of rings.

Am I remotely close in my dialectual summation of coonspeak?
RA