If done right, buying a gun from the UK is a seamless process if you use a respectable importer. Duty will be around 2 - 3% of the cost of the firearm, as I recall. Shipping is not all that much either and should be done between the seller in the UK and the US importer. I would recommend BSA. Ltd., out of Millbrook, NY. Charles has imported guns for me and I have had not any issues except for a slightly damaged stock on one new gun which the manufacturer repaired.