Maxed Weapons Tier List

S+ Tier
AE21C

S Tier
ACR - HP/ +10
SCAR-H  - +10
AK-12 - AP/+10
AUG A3 - AP/+10

A Tier
AKS74U - HP/ +10
AK-47 - AP/+10
Jack Carbine - AP/ +10

B Tier
MK-18 - AP/ +10
M4A1 - +10
M4 Carbine - AP/ +10

S+ Tier
Maverick - Incendiary
PPSH-41 - FlamDrum

S Tier
Vityaz - HP
MP7A2 - HP/ +10
M1014 - Double Load
UMP .45 - AP

A+ Tier
MP5 - HP
Jack Carbine - AP/+10

A Tier
G-21C - HP
CBJ-MS - HP

B Tier
Thompson - HP/Drum

S+ Tier
Maverick - Incendiary
Persuader 500 - Drum Mag
Ultimax 100 - HP
HK21 - AP/+10
RPK - Any attachments

S Tier
M1014 - Double Load
MP7A2 - HP/+10
UMP-45 - AP
PPSH-41 - Flam Drum

A+ Tier
MP5 - HP
Wingmaster - Slug
M870 - Flechette
Vityaz - HP/+10

A Tier
CBJ-MS - HP

B Tier
Thompson - HP/Drum
G-21C - HP

S Tier
EBR - More Mags
Lee Enfield - More Mags
Winchester 1873 - More Mags  
A+ Tier
ARK-3 - More Mags
Ruger 10/22 - Rat Shot 
M14  - Drum Mag
A Tier
M1 Carbine - +5