Can I double stack Rotopax fuel packs on your Bedside MOLLE Racks?

Yes and no. We have had great success with stacking two 2 gallon units, no issue there. Stacking two 3 gallon units will put too much point load on the small space the brackets mounts to on our MOLLE panels. This could lead to metal fatigue over time and cause the MOLLE panel to crack.