Ditto what Cayugad said - it's important to keep the wife happy, but there's nothing wrong with bending the rules. If she laid down the law at "3 rifles", then go ahead and get different barrels for the ones where that is an option. You're not breaking the rules, and you still can have fun.
Or you can just hide the new ones, and when your wife asks what was in that 4 foot long brown box that the UPS guy brought in, just say "new umbrella"