These pouches do not mount to a belt. These have a PALS/Molle attachment.
The High Speed Gear Triple Double Decker TACO Shingle Rifle/Pistol Magazine Pouch comes with 4 clips.
No it will not.
The will work, however they will be cumbersome, the 24 round magazine is the largest I would recommend using in it.
Yes, it will come as pictured.
Yes, everything comes with it for proper installation.
It will not, these are made for 5.56 magazines.
Bought mine in store, came with separate clips.