This system is exactly what I have been looking for! Easy to install, holds everything right where I want it. As I am not a LEO or military, I needed to be able to remove the equipment when not heading to the range, the Rigid Insert Panel MOLLE (RIP-M) - 15.25in x 25in allows me to remove both ARs quickly and store in a safe location when needed, held tight with the Rifle Mount Clamp for Rigid MOLLE Panel - Vehicle Rifle Rack - Full Rifle Mount Kit (Buffer Tube and Handguard Size).
I installed the Rigid Insert Panel MOLLE (RIP-M) For Pelican Case 1700 Lid panel under the flip up rear seat in my RAM 1500. This allows for additional storage of ammo, a knife, and various other tools as well as my Mossberg 500-A1 with the Toggle Quick Release Shock Cord - Rifle/Multi Purpose Straps.
As you can see there is ample storage for 50 12ga Shells, 6 30rd mags held in the Blackhawk M4 5.56 Triple Mag Pouch