Undergiver,
We can"t have self loading centrefires, only manual.(except pump action rifles, which are more "evil" than lever action!)
We can have bolt action, or lever. Calibre ususally up to .30, as it"s hard to find anywhere approved for anything bigger(except black powder or pistol cal carbine.Handguns can"t be bigger than .455.
We can have sound suppressors and hi capacity magazines.
Here in Northern Ireland we can still have handguns, (I just sold my Hi power 9mm with a 30 shot mag and 7x15 shot mags.) .32 or 25 cal pistols and barrels as short as you like. Once you have a pistol on ticket for target shooting, you can take it to any approved club without needing an ATT.
As for the IRA, did"nt you know they decommissioned all their guns? They put them under the pillow and the tooth fairy gave them all seats in our shiny new parliment(I"m moving to Canada on friday)
As for converting a semi to a manual, the law here states that a gun must be built as a manual, not converted. Pulling the piston out would"nt make a self loader into a manual op, at least not in the eyes of the law.