Printed a bottlenose Silly Shell with an 8 inch barrel. I wondered if i could fit the barrel on a SledgeFire shell. So I tried. And here it is. 

separated the barrel and SCAR from the Silly Shell and stuck it on a single shot n-strike SledgeFire shell. 

Made two versions, one with just the barrel stuck on there, and the other with some reinforcement around the barrel to keep it from snapping off too easily.

It will only work with a SledgeFire with the ejector removed, so keep that in mind. (won't fit)

And you can front load Mega XL from the front!