Okay guys, measured the **** out of this thing today. Here's what I've come up with.
Measured the barrel using a wooden dowel, with gun cocked and came up with a measurement of just under 18.5 inches(literally a hair).
Overall length of the weapon was 27 inches.
Whoever modified it knew what they were doing I suppose. I put a straight edge on the end of the barrels and found that it's not exactly straight, but not noticeable unless you're really looking for it to be uneven.
I consulted with a buddy of mine that owns a gun shop. He's going to come get it today to inspect it and do his official measuring stuff.
I'd feel safer buying a new stock for this thing so that's probably what I'll do.
I live in Kentucky, and I'm pretty sure we have the most open, gun owner friendly laws in the country.
Thanks again guys.