I have the ultra light mark 2 in 257 roberts it has the 20" barrel standard lop and a thin stock I really like it it has a 2-7 leupold on it. My dad has the 77 ultra light in 308 with 18" barrel it also has a 2-7 leupold. The 308 starts to walk after 3 shots because of the thin barrel. Dad used it a lot to I got a rem model seven in 7/08 with 18 1/2" barrel.