Look, I'll be honest. The quick answer to your question is 'yes,' if he has UKARA he can therefore buy a 'black gun' and give it to you.
HASSLE NOTE: he's going to have to play at least three games over a period greater than two months (probably at the same site) before he can get sorted on the UKARA database.
LEGAL NOTE: if he gives you the gun and you give him nothing in exchange it could be considered a 'gift,' if you give him something for the gun, like you've said you will, it's not a gift, and then laws are being broken.
