I Recently purchased a Razorback SN 23 for $850. The gun doesn't appear to have seen much use. The gun shoots to the left (3-4" at 20 yards) with every ammo I have tried and I have let friends shoot it with the same results. I don't want to own a gun with the rear sight pushed way to the right and wouldn't feel right selling it. It does not group well either, although that has not been my focus. What to do?