You can't have a war without weapons, and there are plenty to go around in each Halo Wars Megabloks set.
M7 Sub Machine Gun
Sets Included In:
USNC Turret (1 total)
Warthog (2 total)
USNC Scorpion (1 total)
M90 Tactical Shotgun
Sets Included In:
USNC Turret (2 total)
Aerial Ambush (1 total)
USNC Hornet (1 total)
Covenant Beam Rifle
Sets Included In:
Covenant Ghost (1 total)
Aerial Ambush (1 total)
Warthog (1 total)
USNC Scorpion (1 total)