What is the best SMG in Warzone 2?

This is a difficult question, but I'll do my best to give you the insights and best loadouts. In my opinion, the close-range meta is very open right now, and depending on your playstyle, the answer will not be the same.

What is the best aggressive SMG in Warzone 2?

For season 1, the best SMG in Warzone is, without a doubt, the Fennec 45. The main strength of this weapon is also what could be the only downside: the fire rate. Experienced players will manage to control the recoil due to the fire rate, but casual players might prefer one of the two other options below.

Close Range

Sniper Support

Muzzle
Lacerta Compensator
0.65
0.26
Laser
VLK LZR 7MW
-0.38
-25.93
Stock
Agile Assault-7
-3.1
-1.47
Underbarrel
Phase-3 Grip
0.57
-0.19
Magazine
Fennec Mag 45
Muzzle
Lacerta Compensator
0.65
0.26
Laser
VLK LZR 7MW
-0.38
-25.93
Optic
Cronen Mini Pro
-2.29
-2.25
Underbarrel
Lockgrip Precision-40
0.47
-0.27
Magazine
Fennec Mag 45

What are the best versatile & reliable SMGs in Warzone 2

I agree that the Fennec is not for everyone. If you are looking for a reliable SMG that you can use in most situations and will never let you down, you are probably looking for the Vaznev-9k or the Lachmann Sub.

Best Lachmann Sub Warzone 2 Loadout

Close Range

Sniper Support

Barrel
L38 Falcon 226MM
0.29
-0.3
Laser
VLK LZR 7MW
-0.31
-21.3
Stock
MEER Recoil-56 Factory Stock
-2.93
-1.49
Magazine
40 Round Mag
Ammunition
9MM Overpressured +P
0.55
-7.29
Muzzle
Singuard MKV
0.81
0.77
Barrel
FTAC M-Sub 12"
0.24
0.28
Optic
Cronen Mini Pro
-1.74
-2.25
Underbarrel
Lockgrip Precision-40
0.57
-0.14
Magazine
50 Round Drum

Best Vaznev-9k Warzone 2 Loadout

Close Range

Sniper Support

Muzzle
Spiral V3.5 Flash Hider
-0.48
0.28
Laser
FSS OLE-V laser
-0.37
-37.76
Stock
Markeev R7
-2.79
-1.97
Magazine
45 Round Mag
Rear Grip
True-TAC Grip
-0.54
-0.18
Muzzle
Singuard MKV
0.96
0.7
Barrel
KAS-1 381MM
0.31
0.21
Optic
Cronen Mini Pro
-2.39
-2.25
Magazine
45 Round Mag
Rear Grip
Demo-X2 Grip
-0.34
-0.22