Is there a requirement to possess a licence or some other type of paperwork for a decommissioned rifle of WW2 vintage, considering it still has a functioning mechanism, though barrel blocked?
The Garda website has a whole section regarding firearms as the law changed last year. Have a read of it, they definitely make mention of this issue. http://www.garda.ie/Controller.aspx?Page=4144 Page 30 of the handbook is what you want - they define what is "antique"