CMD has the highest carrying capacity of the Legionnaires due to the epic strength he has as a perk of his position as Chief Damage Absorber, so Spider equips him with the LoIB, thus granting him another title; Defender of the Loot.
As Chief Damage Adsorber, is CMD kind of like the
Red Shirt security guy in Star Trek who always gets beamed down with Kirk, Spock, and Bones and who immediately gets his azz whupped by some alien?
You know, this guy, before he became the the plucky comic relief.