The Viking Tactics VTAC Chest Rig uses an H-Harness design.
The Viking Tactics VTAC Chest Rig comes with 4 built in M-4 magazine pouches. Based off some reviews, they can be a little tight for even Magpul PMAG's for 5.56. Because of that, I would assume that you would not be able to fit AR10 style magazines in this rig.
The Viking Tactics VTAC Chest Rig comes with 4 built in M-4 magazine pouches. Based off some reviews, they can be a little tight for even Magpul PMAG's for 5.56. Because of that, I would assume that you would not be able to fit AR10 style magazines in this rig.
No guarantee that the Magpul M3 40rnd mags will work. They will fit the pouch but might be too tall for the retention bands.
Yes, it should fit over a ballistic vest.
No, there is no velcro panel inside the rig.
Viking Tactics does not list the exact dimensions of this rig, but they are one size fits most.
No, they are integrated. While the Molle version has magazine pouches built into the vest as well, you can add or remove other pouches as you see fit. You can find it here: https://www.opticsplanet.com/viking-tactics-vtac-molle-chest-rig.html
It is meant specifically for standard AR-15 magazines and cannot be guaranteed to accommodate the much larger AR-10 magazines.