Having had see-through mounts, I can't think of any positives. I knew nothing of rifles, & said nothing when they mounted my VXII in see throughs. What's wrong with 'em?

1) They jack your head up off the stock - poor cheek weld.
2) They're weak as hell. You can twist the scope from side-to-side without too much effort.
3) They made it a b!tch to get my rig into the saddle scabbard on my elk hunt.

With a 2-7, you'll have plenty o' FOV: no need for iron sights.

FC