The regular gen 2s are cheaper without the combo deal. Throw on 10 for free shipping and then use the promo code. Art of the deal. You save $20 and get 3 more mags.
I’ve got 5 coming today.
while true it's a better deal if you just want magazines, some people might want a range bag and enough mags for a fighting load.
The whole process is delicate and dumb and I hate it.
1. mount rings or ring base to a rail section (3/8 weaver, 1913 section, et c) square with referenced flat base.
2. turn the rail section upside down and use a flattening stone set on a base to even both rings out so they sit absolutely flat and parallel.
3. check each ring for height across the flats to be the same +/- 0.001".
4. mount the ring or ring base to the rifle's receiver following the manufacturer's instruction. typical is needing rocksett or other thread-locker and torquing to something like 30 in-lb for the ring-to-base mount.
5. test fit scope to rings, check for level using a flat on the scope. if there isn't one, you can level using a strung up plumb bob in a bucket of water and superimpose the cross hair so the vertical hair matches the string. works best with high contrast, good lighting, and about 10 meters of distance. be sure to use a magnification power no higher than 3 or 4, alignment should be consistent across all magnifications.
6. verify the scope level on a flat again as in step 5, but now add another level across a flat on the receiver (typically a bolt raceway with an L shaped magnetic tool that is also verifiably square). the bubble between the scope and receiver levels should match.
7. loosely install the top of the rings to the ring bases finger tight in a cross pattern one full turn at a time. be sure to alternate between rings.
8. insert alignment rods that are verified good to check alignment. if not aligned, lap until they are, you may also opt to remove enough material for a shim.
9. install the scope again, verify level again, tighten rings in cross pattern, not to exceed 25 or 30 in-lb. if it's an older scope or ring consider stopping at 15 in-lb and verify with live fire later on. most modern scope rings do not need alignment, lapping or more than 20 in-lb. vertically split scope rings should never be lapped, lapping is purely for horizontally split rings. misaligned vertically split rings should be exchanged for a new set.
you can also forget all that noise and get a one-piece mount and worry only about rotation and over-tightening. for military equipment with an integrated mount (ACOG, Wilcox, Aimpoint, Steiner, et c) the good old M14/M60 "hand tight and a quarter more" works great, also a half dollar works great as a field screw driver, as does the back of a bayonet, edge of an entrenching tool, and so on.
if I should daily carry it in the ferguzone 
. Its just a basic bitch black for now, I will probably buy a gold one if I like it but I expect a year wait before that.