Here is a side-by-side video comparison of the MATBOCK OTB Raider Line Vs. a traditional OTB setup.
For their dry bag line, the MR Dry 2.0 they are available in Small 3400 cu-in (56 liters), Medium 4700 cu-in (77 liters), and Large 7450 cu-in (122 liters). Small and Large are the two most popular sizes and all three are compatible with any military-style frame, but MATBOCK offers them with the Mystery Ranch Nice frame (you can also get them without the frames. Here is a brief overview video of the MR Dry 2.0 bag (large size shown in the video).
Check us out at ADS Warrior East tomorrow and Wednesday. Here is where you can register for the event: www.adsinc.com/events