Looking at a Winchester factory slug barrel for my 120 12ga pump. It is used, not abused, but does need a sight elevation ramp for the rear sight. It shoots 2 3/4 and 3in and the cost is $50 delivered to my door. Is this a good price? Also, as far as the rear sight goes, I've checked out gunpartscorp.com and all they have is for 1200 and a different one for the model 1400. Do you know if either of these two elevation ramps will interchange with the 120 Ranger? Thanks