If it was me, I'd go with the Type 2 adjustable LED, 6 MOA, with a Pic mount. The reasoning I'm using is that the adjustable LED doesn't have a reputation for sucking, the 6 MOA dot is good out to 100 yards (so's a shotgun) and it's big, so it's a bit quicker than a smaller dot, and the mount is pretty self explanatory. I'd put a tenebraex cover on it, a little extra protection and it stops the flash reflection off the glass.