If your asking if the mares leg/ranch hand is legal then yes it is, non restricted too, overall length of 26" barrel length gets more convoluted but for a manual action ie: a lever action it can bet less than 18" if it was manufactured that way, an example is a dominion arms grizzly pump shotgun with a 10" barrel is a legal non restricted long gun.
Gotta love our laws..... (Yes that was sarcasm)
Reading your post again if your asking if you can make it shorter then no I don't think you can, I haven't measured my ranch hand but I doubt it's much more than the minimum 26"




























