Re: Do NFA regulations apply to antique firearms?
You're definitely right that using a shotgun with 2 3/4" chambers would be a sawed off shotgun.
I think that the 2 3/4" shell wasn't introduced until the 1930s, so a 12 gauge from the 1890s should have 2 5/8" chambers. I have never seen 2 5/8" shotgun shells available for sale (except maybe on some ammo collector's table at a gun show), so I think I should be OK.
Of course, the above paragraph included two uses of "think" and one of "should," so I will definitely check with ATF. I am working on the letter right now; I will post it on here for comments shortly.
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