I have an "extra" DP Pro - the triangle model my wife didn't like on her Compact.
Yesterday I got an Primary Arms e-mail/saie paper and while going through stuff I saw a DP Pro mount for a rail (like the flat top AR15 receivers/quad rails.) I ordered one and a 1/2 riser to get it up a little off the top of the rifle.
I'm wondering whether it'll work best with the DP Pro on the upper receiver, or out on the rail on the free float tube. Anyone else mount a dot sight on the free float tube instead of the upper receiver? If the DP Pro was on a pistol it would be way out away from my eyes vs. up close like on the upper receiver.
I also ordered one of those Primary Arms red dot sights they say the battery can last up to 50,000 hrs. in. I've got several of the Lucid sights (that look like an ACOG) and I'm sometimes finding a dead battery in them after sitting in the case (off) for a few months. Not sure why a battery would go dead when the switch is OFF, but a couple of them have done just that. I liked the idea of the Lucid sights because they used AA batteries which are easy to get just about anywhere and you can even buy rechargeable ones. The little Primary Arms red dot uses a quarter sized watch battery (same batter the DP Pro uses, 2032 I think). But if it can (possibly) last up to 50,000 hrs. when turned on maybe it will last well in the case when turned OFF, too.
I also ordered a full co-witness mount/base for the red dot.
We'll see how all that works out.