Badger ordinance or Talley Tactical rings. 20 MOA pic rail on both rifles. Badger makes one for the gas gun. It attaches on top of the flat top upper, it gives the proper higher cheek weld for the gas gun. That's the way I use one scope on a gas gun AND a bolt action.
how would that work? wouldnt the scope lose zero if i switch it from one gun to another and the badger ordnance rail, is it the 22moa riser rail? or something like that, its like a pic rail that goes on too the top rail of the upper?
Yes zero is going to move. I have seen it be repeatable on six rifles, since I have three scopes. Each scope pulls duty on two rifles. Move from rifle A to rifle B, fire one round on clean white paper, note where it landed, adjust accordingly, write down the adjustements needed to get zeroed on rifle B, zero out the turrets. When you move back to rifle A consult the notes, and adjust accordingly. Fire a round and see how close it is.
The last time I did this I moved the SS 5-20X from the 7mm-08 to the .22-250. Down .8, left .3 Then went and shot prairie dogs for three days, moving the rifle in and out of the truck many times. The next week I got back to the range, and moved the scope back to the 7mm-08, I consulted the notes, and moved POI accordingly, on the turrets. First round was 1/10 high. That's what high quality bases, rings and scopes can do for you, it allows you to not have to buy a $1K+ scope for every rifle.