A little update for anyone interested. Since my last post, I've got the front sight mounted and managed to get the rifle zeroed. With the peep sights you see on it in the other picture.
The next step will be to see how many clicks it takes on the A2 rear sight to get out to 300 yds. (Any ideas / guesses?) As well as make sure I can maintain some degree of accuracy at that range.
I will update with a 300 yd target picture when I get a chance.
For anyone who is thinking of trying this. When trying to get a zero with the front sight I actually ran out of adjustment. I shimmed up the rear with some thin washers and then bedded it down with JB Weld. I also filed down the front sight to get some more adjustment out of it.
In retrospect I would shim the rear first and see where that got you. You do need to use the CQB peep because it is so far from your eye. I actually like that though, as it gives you a really big field of view.
From the rear of the stock to the rear sight is 16" and then the sight radius is 17.5". Again, in retrospect, I would probably make the sight radius between 16.5 - 17.0". Doesn't sound like much but if you play with it you will see it makes a pretty big difference.
There it is for what it's worth to anyone. Good luck to everyone this season!