I tried this sight a few months ago with my TRS and have found I prefer 10-8's. This sight is a standard rear sight for a Novak sight cut. The one difference in this sight from a standard HD is the rear has been opened up from the stock .135" to a .150". The sight is in great shapre and includes the set-screw. There are brass marks from removal but I am sure they'll clean up fine...just haven't gotten around to it yet. It is a very quick to acquire sight, I just prefer 10-8's and want to keep my pistols the same. Any additional specs can be found here - http://shop.harrisoncustom.com/products/143-hd-004-extreme-service-rear-sight.aspx Price - $45 Shipped standard USPS within the CONUS. Not looking for lower offers at this time. I think near 20% off new is plenty reasonable. ETA - SPF Payment - USPS Money Order Only. If you have any questions please ask.