Should point out that I am in the uk so the magazine offer would get me hauled up before customs and probably the police, Last time i fired a weapon with live ammo was about 15 years ago and that was a crappy SA80 with the dumb magazine release on the inside, so if you run with it the mag drops out lol.
So automatcally going doing the airsoft route, and even that is tough here, if it even resembles a firearm (real imitation firearm), there are certian laws that mean you have to go to a skirmish at least 3 times in 2 months to be able to hold one, or paint 53 percent a bright color, it is also against the law to have anything attached to a RIF...
My only saving grace, is the VFC MK18 MOD 1 is a Daniel defence and colt licenced product so it is 100% close to the real thing that you are going to get.
Supplied by VEGAforce Company (generic picture from web)
How ever next time i am going to be in the states with your offer, i will try and get on to you about the trip.