putting a red dot on a revolver

I thought I'd try using a revolver for centerfire with a red dot. I have a M14-3 that shoots great, how could I get a red dot mounted on it? I also have a newer 686 that I believe would be easier to do this too....Thoughts? It'd be a 30mm Ultradot. Thanks

Drill and tap then mount 
http://www.jackweigand.com/swhpmnt.html

There's also Aimtech.  http://www.aimtech-mounts.com/smith-wesson-revolver-mounts/

The 14-3 may be too old to have the mount hole already drilled and tapped but most of the S&Ws from the last two decades already have an extra hole under the rear sight which will work with the sight mount screw holes themselves to allow a no-gunsmithing installation.

Bruce

If you remove the rear sight from you 686 and it looks like the picture below, you can use the 'WEIG-A-TINNY' rail without drilling and tapping.

The Weaver base costs a lot less and works great for Bullseye loads. I wouldn't use them on a 460mag but I have them on all my BE revolvers.

http://www.mountsplus.com/mm5/merchant.mvc?Store_Code=MSP&Screen=PROD&Product_code=105-WVR-4800

https://www.allchingunparts.com/collections/all?page=2

LenV wrote:The Weaver base costs a lot less and works great for Bullseye loads. I wouldn't use them on a 460mag but I have them on all my BE revolvers.

http://www.mountsplus.com/mm5/merchant.mvc?Store_Code=MSP&Screen=PROD&Product_code=105-WVR-4800

+1.  Works great on my 686 and I've shot house 357 loads through it without problems.  Wow, I paid almost 4x that amount for the mount some years ago...

Mounts plus is out of stock but Midway still has them.

http://www.midwayusa.com/product/1477364308/weaver-top-mount-scope-base-401

ordering one, thanks LenV

Don't forget these. That Ultra dot came with vertical split rings. They work but, these work better. Personal opinion.

http://www.ebay.com/itm/Weaver-49174-SSimmons-See-Thru-Rings-30mm-Matte-Black-/381844335927?hash=item58e7b22d37:g:GNgAAOSwcUBYI~su

Great info^