[Haldor]

I am looking to mount a red dot sight on my 6" Ruger Mark II pistol. It is not drilled for a rail. Here is a pic of my pistol.



I have seen rails that replace the rear sight and other ones that clamp onto the receiver.


http://www.rimfiresports.com/merchan...ory_Code=VC2SM

Or replace the rear sight:


http://www.mgwltd.com/firearms.shtml

Any recommendations on the best way to move forward? I plan on mounting an UltraDot sight on it, so the rail will need to be pretty stout.

Am I better off just getting my pistol drilled and tapped to use a standard rail like this?