The metal bottom plate and trigger guard was made by Whitetail Industries, and Brownells sold them, along with the kit to change the bolt release to the 700 location (made by Ultralight Arms). I see no great advantage in a 7 over a 600/660, in either direction. The 600 is slightly more compact, the 7 has better bottom metal and bolt release. That's pretty much it, other then that, go with what fits you better. I like the 600/660/Mohawk rifles for their compactness, they make great LW mountain guns. - dan