Longtime resident Lady Liberty, age 236 was struck by a stolen Chevy Volt last night along the interstate. The driver and passengers, illegally in the US from their native countries across the world, then dragged Ms. Liberty into the woods and brutally sodomized her before heading to the local polling place where they registered using the names of Supreme Court justices and voted without being challenged by UN poll watchers.
Authorities found them around the corner, each with a large supply of newly legalized recreational marijuana, getting high. They were taken into custody and released a short time later with a kiss on each cheek and a prepaid gift card for WaWa to handle the munchies.
Ms. Liberty is in extremely critical condition in the Intensive Care Unit, and doctors are very wary of her chances of recovery. A crowd of zombie-like citizens are already gathered at the Liberty residence, preparing to loot it of valuables when she succumbs to her injuries or the Death Panel declares her worthless and pulls the plug.
I own several H&R topper shotguns in a few different gauges. None of mine interchange - but I really have no idea about a model 158. Didn't realize they had 3 digit model numbers.
If a shotgun's barrel needs to be extended, I'm not sure how a gun smith would solve that cheaper than purchasing a longer barrel - even for the very hard to find H&R shotguns. They would need to machine the ID and OD to make a barrel extension that exactly fits the existing barrel, weld the two together, then machine the weld to clean up the joint, and finally blue the joint so you won't see it. So labor intensive and expensive it's not worth doing unless you have your own shop and can do it yourself.
And, if anyone owns an actual shotgun with a barrel that's not long enough, they wouldn't like you posting about their shotgun on the internet for everyone to see. I recommend you delete the post to protect your acquaintance.