From Halopedia, the Halo wiki
Model series:
M8C
Operation:
Directed energy[1]
In service:
Post-Covenant War conflicts[1]
The M8C Grindell/Galilean Nonlinear Cannon (M8C G/GNC) is a nose-mounted laser cannon that is equipped on the G79H-TC Pelican gunship.[2][3][1]
In Halo 4 the HUD element for the M8C uses the M6 Spartan Laser aiming reticule.[1]
The Hud of the G79 in Halo 4.