I inherited a sears model 20 shotgun from my grandfather about 5 yrs ago. It is a field gun and I have not and probably wont use it for hunting. I have always wanted to have a sbs. This leads me to my question. Should I go ahead and begin the next step by filling out the paperwork and cut the barrel to 14, 18, or leave as is for my children years down the road. I will not be cutting the barrel however that will be left to a professional and I also think that I will have it ported as well. The gun overall is about 75-80% condition. The only reason I ask is I do not yet have children and don’t want to regret the decision.
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I wouldn’t cut it. It is just an heirloom, no significant value but I’m sure a kid would love to have their great-grandfathers gun hanging over the fireplace…or somehting like that. I know I’d like to have a gun my great-grandfather had.
Now you have a reason to have sex…and make some heirs 
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I will tell the wife you said so…:lol:
I have shtoguns from my grandfather, great grandfaher, and great-great grandfather. Don’t touch it.
Find a spare barrel. SBS it with THAT and pass it on with the normal barrel?
I want to add that I know next to nothing about NFA laws concerning SBS tax stamps. 
This may not even be possible.
It’s an heirloom gun, or it would be to me. It may or may not be worth much money, but it’s part of your family’s history. With 870’s selling for around $300, and 14" 870 barrels selling for $100-150, why go cutting on a piece of history when you can have a more modern, more reliable, easier-to-find-spare-parts-for, and more modular/adaptable/whatever?
Use it to teach your kids how to shoot and buy an 870.