It's a Bushmaster, made for Remington. The ones I've seen are A3 tops, and all are camo-colored.
Bushmaster and Remington are both owned by Cerberus. Remmmy wanted an AR15 platform, and they wouldn't need to re-tool. Bushmaster's excess capacity is taken up, and Remington gets a new gun for their catalog.
I have the Remington R15, and it's an excellent gun. Quite accurate.<br>
Instead of the VTR bolt action, you might look into the Savage Predator Hunter. I bought one for my son in 223 for his high school graduation. Here's a photo of Sean with his Predator Hunter and a young coyote he shot last summer. Sean called his shot and hit this coyote, which was trotting at 175 yards out, right where he said he would - behind the ear.