I've seen these "plates" that you can buy for pistols that replace the stock sights and you just toss something like a JPoint or Docter sight on it.
They're like these things.
http://www.opticsplanet.com/jp-rifle...r-pistols.html
So slide out your stock sight then put on a micro red dot sight on the plate, in this case a JPoint, then slide the new sight onto your slide.
Not 100% sure on how it works or how effective it is but that's up to you. I'd like to know the results though, I'm thinking of buying an SBR M4 and tossing a Docter sight on it for use in CQB.