The Weaver GS are good scopes, but for the money I'd buy a Nikon Monarch or Elite 4200 every time.
I'm a little hesitant getting a fixed scope. In years past, and I'm talking about 30, 40 years ago, the 4x fixed power scope was the standard, especially over any variable scope because the variables were not as reliable as the fixed. However, today the variables are just as reliable and durable as the fixed, AND you get variable magnification. As such, I would get a 2x-7x over a fixed 6x.
Zachary