Thank you for your reply!
Premium Shotguns:
Iris Shotgun - Lvl 7 - Picture in attachments
Iron Crow Shotgun - Lvl 15 - Picture in attachments
Cruelizon - Lvl 24 - Picture should be in attachments but I can only upload 5 attachments apparently.
Pioneer - Lvl 40 - Picture in attachments
There was I believe also an "Adventurer Shotgun" something just like the "Adventurer Long Sword" in Ijji with a standard model for like lvl 5 shotguns. I believe you could use this on Lvl 1. There were a lot more (premium) shotguns though. Like the "Thor", "Stormbringer" and the "Arquebus". I think I just add them later with pictures if available.
Shotguns you could buy with "bounty" at the time:
Breaker 3 - Lvl 5 - Part of a in-game picture of character view screen. Has the model for Breaker 3
Breaker 5 - Lvl 10 - Same model as Breaker 3
Breaker 6 - Lvl 15 - Same model as Breaker 3 and 5 I believe
Avenger - Lvl 30 - Can't seem to find a picture of this one. It had the same model as the Avenger.MK II though. It was similar to the Iris Shotgun but not entirely the same.
Breaker 7 - Lvl 30 - Picture in attachments
Avenger MK.II - Lvl 45 - See "Avenger"
Breaker 8 - Lvl 45 -Picture in attachments (same model as Breaker 7)
Also the reason I started this thread was not because of levels specifically but because of the fact the models of the shotguns I mentioned in the OP are wrong. Also because the Cruelizon shotgun (model) is nowhere to be found of all the shotguns buyable in FGunZ.
Sincerely,
Maw
Ps: Here are the stats of most guns in the game. Don't know if it's 100% accurate. Link
Pps: The model now stating in the game that it is "Iron Crow Shotgun" could very well be the "Avenger" and "Avenger.MK II". It was similar to the "Iris Shotgun". I take a look at it again later.