I dont know much about Ruger's but the folks over at rimfirecentral (http://www.rimfirecentral.com) can probably help you out.
--------------THE OLD STYLE RUGER MARK111 HAVE THE HEEL RELEASE ON THE BOTTOM OF PISTOL GRIP WHICH ISN'T ALL THAT BAD. SO FAR AS SCOPES AND AIMPOINTS GOES B-SQUARE MAKES SEVERAL MOUNTS. ONE GOES WHERE THE REAR SIDE DOVETAIL AND THEN CONNECTS AROUND THE BARREL IN FRONT OF THE CHLAMBER, ANOTHER WHICH IS MORE SOLID IS THE ONE THAT SCREWS INTO THE WHERE THE REAR SIGHT GOES AND SCREWS INTO THE HOLES WHEN YOU REMOVE THE FRONT SIGHT. I HAVE A WEAVER SCOPE ON MY RUGER MK III USING THE B-SQUARE AND CAN HIT SMALL TARGETS ALL DAY LONG AT A LITTLE OVER 100 YARDS. THE BUCKMARK IS A GOOD GUN BUT I DON'T THINK IT WOULD BE ANY MOR ACCURATE THAT THE RUGER. SO FAR AS TAKE DOWN A RUGER ALL YOU DO IS PULL OUT THE TAKE DOWN LATCH ON THE BACK OF THE GRIP AND PULL DOWN AND OUT. THE BOLT WILL THEN PULL OUT OF THE BACK OF THE RECEIVER, THEN YOU BUMP THE BACK OF THE RECEIVER AND IT WILL MOVE FORWARD AND SEPARATE FROM THE GRIP. THE ONLY TROUBLE IS PUTTING THE TAKE DOWN LATCH BACK IN THE GRIP WITH THE BOLT STOP COMING OUT THE HOLE IN THE TOP OF THE RECEIVER. ONCE YOU DONE IT SEVERAL TIMES IT NO LONGER A PROBLEM. SO FAR AS FINDING SCOPE MOUNTS FOR THE OLDER RUGER YOU CAN ORDER THEM FROM (MIDWAY). YOU ASKED ABOUT THE PRICE BEING HIGH. CHECK OUT WHAT THEY ARE ASKING FOR THEM ON GUN BROKERS. ALSO IF THE BIRD ON THE GRIPS ARE COLORED RED YOU'VE GOT A COLLECTORS ITEM WORTH MEGA BUCKS.Flashpoint said:I found an old used Ruger mKII at a shop the other day. It's the older model, it looks just like this one, with the mag release at the butt of the grip, old style grip panels, and it wasn't tapped for a scope mount. It did come with four mags and I'd say it's at about 92% give or take a little. They wanted $250 for it, I was thinking about offering them $200 for it some time next week. Is the $250 a fair price? Also I've heard Rugers are a PITA to break down, how true is that and what's the difference between breaking down a Mk II and a Buckmark (which is my first choice really)? Also I've seen some picks posted of some Mk II with red dots that have scope mount that lock around the barrel. Where can those be found and for how much. The only ones I can find online are the rails the screw into the top of the gun. Are the older Ruger mk II any better/worse than the new ones? Should I just save the $100 and go with a new Buckmark, seeing as I can't find any good used ones?