I bought a bors for my 5.5x22 -56 nxs. That was mounted on win 308, for the last 6 months ,bors is in perfect condition not a scratch. Used a few times at the range . I paid 1300$ new and had to buy barrett rings also . must sale due to federal taxes ,that my accountant says I owe the goverment ,will give somebody a smoking deal on this unit. Email me at [email protected] .unit is only 6 months old.