Ok guys, supposition time(that's guessing for HP and 3P0):
We know Ryker was a Ranger but what was his secondary MOS? Straight Infantry(grunt) is useful in a fire fight. Demolitions is a great add to destroy the minnow's club house or sabotage bikes. Designated Marksman makes ambush tactics more effective as a Force Multiplier. Counter Insurgency Specialist is going to really swing the balance of power to RMC.
We also know Dillon was in Ryker's Team, another possible "I'll follow him to Hell and back" situation brewing. Not many times do they duplicate secondarys in a single team, so what was D's role?
Marcus(Security for Nora) was Force Recon Marine, what was his Primary MOS before RIP?
Those 3 alone could wreck the minnows physically and mentally with what they know.