At the very least I would think that each barrel would qualify as an AOW and the entire thing would violate every safety rule. Besides, some yahoo would probably defeat the whole purpose by loading it with birdshot because they read on INGO that it was the only "safe home defense round".
I think we all know that the only safe load for your multi-barreled ceiling gun is waxer slugs as made by Barry at Moss Pawn (look it up on Youtube....you'll subscribe)
Yep I'll take 2 or perhaps 20 of each. Along with one I can't currently find a link for where they basically turned your car into a switchblade. Under your car they installed a 5 ft long or so sharpened blade that was spring propelled. If someone attempted to carjack you, well......