Yes, I have some swords and guns. Nothing bigger than a .54 caliber though, and that's a flintlock that's a-building. Well, if you discount the two shotguns, but they're not measured in caliber but in gauge.

Now, I happen to know that Some Who Live In San Diego and who does sea kayaking (but who will otherwise remain nameless here) has a quad-50 in his backyard mounted on an M113 armored personnel carrier; a 105mm howitzer "for duck hunting"; an interesting collection of explosive ordnance, including but not in the least limited to naval mines, and other and sundry devices obtained by fair means or foul from international arms dealers.