No Upgrade
Tier List

S+ Tier
AE21C

S Tier
AK-47
AUG A3
SCAR-H 
AK-12

A Tier
ACR 
MK-18
Jack Carbine

B Tier
M4A1
M4 Carbine
AKS74U 

S Tier
MP7A2
UMP .45
Jack Carbine

A+ Tier
MP5
M1014
Vityaz
PPSH-41

A Tier
G-21C
Maverick
CBJ-MS

B Tier
Thompson

S+ Tier
Ultimax 100
HK21
RPK

S Tier
MP7A2
UMP-45
PPSH-41
Persuader 500

A+ Tier
MP5 
Wingmaster
M870
Vityaz
Maverick
M1014

A Tier
CBJ-MS

B Tier
Thompson
G-21C

S Tier
M14 EBR
Lee Enfield
ARK-3
Winchester 1873

A+ Tier
M14
Ruger 10/22

A Tier
M1 Carbine 

S+ Tier
Gold Revolver
Revolver

S Tier
P226
Walther
A Tier
G17
HK USP
B Tier 
FNX-9
G18
Cz75
A-3000
C Tier
Makarov PM
Hi-Point C-9 
M9

S+ Tier

Katana: Eclipse Blade -  Ghostwalker - Zweihander - Chainsword


S Tier
Hammer: Merica Flag - Cyber Spear -  Scythe


A Tier
Wrench: Pan - Rubber Chicken - Pipe
Machete


B Tier
Hatchet: Candy Cane

C Tier
Karambit - Scalpel - Hot Dog - M9 Bayonet