Mine are:

Assault rifle: M-96 Matttock

Heavy pistol: Arc pistol

SMG: M-12 Locust

Sniper rifle: M-92 Mantis

Mine are:

(ME2)

Heavy Pistol: M-5 Phalanx

SMG: M-12 Locust

AR: M-96 Mattock (Sentinel Run)

Sniper: M-98 Widow (Infiltrator Run)

Shotgun: Geth-Plasma-Shotgun (for companions)

Heavy Weapon: M-920 Cain

(ME3)

Heavy Pistol: M-11 Supressor

Sniper: Black Widow

SMG: N7 Hurricane (for companions)

AR: N7 Typhoon (for companions)

Shotgun: Geth-Plasma-Shotgun (for companions)

In all 3 games I use the same loadout for me and my companions. If not stated otherwise.