I'm in Garfield Cty, about 60 miles east. There are a few members in Mesa Cty, but they're not real active on the boards.
Jerry's Outdoor Sports is a real good store. I know where to find him, but I think he's listed as being in Clifton. A Pawn Shop down town does $10 transfers, unless he's raised them in the past couple of years. There is a Sportsmans Warehouse on the west side, but downtown is a place called Crime Control Specialists. He has a real hard on for SW and will order you anything you want and will beat their price.
There is the Orchard Mesa Gun Club, a private range though I don't think the membership fee is very much. Not like what I'd expect you'd pay back east. There is a lot of public land you can shoot on, but I'm not familiar with just where or how to get there.
Oh, BTW, there is a gunshow the weekend of 3/11 in G.J. at the convention center. I'm really hoping I can get away and attend it. It's going to be as good as it gets for around here, but will probably be a big disappointment compared to some of the big shows that run back east.
Oh yeah. Come on over to www.Co-AR15.com. I'm the moderator for the west slope forum. The place is a bit more active for Colo. shooters than this hometown forum, but it's mostly the same guys, just a smaller board.