Hi, I asked a friend who is in the PSNI. I to have bought lots of rifs and gifted them to my son. I was told that the ukara is for purchase only so that it doesn't have to be two toned, registered to a name,Its basically there to protect the retailer so they are liable for illegal sales,etc, now i know gun laws are different over her in Northern Ireland. As long as it's only used at a game or on private land with the owners permission, it's fine. There has been loads of swap and sells at local airsoft fields and if 2 responsible adults wish to swap or sell to each other then they don't need to see or even ask for their UKARA. As I said our laws are more restricted over here as we're restricted to 1 joule but there is a shop I go to in Dundalk Ireland and they don't even require a ukara to buy at store or even online.