GREAT condition COLT XM177 PFC gun, NOT KIT VERSION, in US

Getting ready to move again, and realizing that I just don't use my modelguns much. This poor thing appeared briefly in one film (Clutch: http://www.imdb.com/title/tt0475239/?ref_=nm_flmg_act_5) and since then (after cleaning) has been sitting on a shelf, first in Seattle, then in Richmond, and it doesn't need to come with me to Wyoming.

Still in the original box. Comes with your choice of Vietnam-era (or civilian-legal in some places) 10-round mag or the more typical 30 round mag (I also have a COLT AR15 modelgun with a few magazines, so I'll keep the one you don't want), 10 brass cartridges, and several tools that it came with, all as pictured. Slight surface rust on the magazines, but gun (plastic body, metal internals) looks near pristine, including trademarks and muzzle (not orange, so legally this needs to go to someone who isn't going to use it for commercial use other than theatrical or film props). Dust cover even stays shut, which is more than I can say for my other AR modelgun. The 10-round magazine sticks a bit on the way out, but that may just mean it needs oiling, or a little sanding of the top.

These things are awesome, but they need someone who knows how to run and clean them and take care of them, which is why it hasn't gotten rented out as much as the rubber or airsoft ones, and why I think it needs to go to a better home. They aren't idiot-proof.

Would like to get $500 shipped within the US, but open to reasonable offers.

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Thanks!
-Kevin