Can someone tell me where the Piron weapons come from? I only see them in the auction. They are a loot? Never seen a BP either.
Usually one mob type will loot various models of the same level. So when I hunt otorugi I get 22s from the four different types, plp, pbp, plr, pbr.
Kikki Jikki has several shops one in the quarry booth area one in celest area and the other at sanctury cove. Some are now looted weapons but others are crafted from memory Kikki has a range of them in the shops and booths. Worth checking the different shops out as he has different weapons in each. Also check out some other shops as there aree often ones with less MU than auction around if your prepared to go around the shops on a trip or two.
As Neil stated, they are not craftable, therefore no BP's. I believe they were added at the same time their Arkadian cousins (ARK-...) were taken out of the loot pool. They are awesome, efficient weapons IMO.