Added during GDC. Their blurb says 73 weapons but I haven't counted them myself.

__Pistols__

Colt M1911A1, Beretta M9, Beretta M9 SD, Makarov PM, Makarov SD

__Assault Rifles__

AK-107, AK-107 GP25, AK-107 GP25 PSO, AK-107 PSO, AK-74, AK-74 GP25, AKS-74 Kobra, AKS-74U, AKS-74UN Kobra, AKM, AKS, M16A2, M16A2 M203, M16A4, M16A4 RCO, M16A4 M203, M16A4 M203 RCO, M4A1, M4A1 QDS, M4A1 QDS CAMO, M4A1 M203 RCO, M4A1 CCO, M4A1 M203 Holo, M4A1 M203 Holo SD, M4A1 M203 SOPMOD SD CAMO, G36, G36C, G36C SD, G36K, XM8, XM8 M320, XM8 Marksman, XM8 Compact, XM8 SAW

__Machine Guns__

M240, M249 SAW, Mk48 Mod 0, PKM, RPK-74

__Sniper Rifles__

CZ 550, DMR, KSVK, M107, M24, Mk12 SPR, SVD Dragunov

__Special Purpose Weapons__

MP5, MP5SD6, PP-19 Bizon, VSS Vintorez

__Shotguns__

Benelli M1014, Saiga 12K

__AT/AA Launchers__

FGM-148 Javelin, FIM-92F Stinger, Igla 9K38, M136, RPG-7V, RPG-18 Mukha, SMAW, Strela-2 9K32

__Mounted Weapons__

AGS-30, DShKM, Kord, Browning M2, MK-19, ZU-23

__Static Launchers__

Igla AA Pod, AT-9K115 Metis-M, Stinger AA Pod, SPG-9, TOW

__Artillery__

Podnos 2B14, M252 Mortar, D-30 Howitzer, M119-A1 Howitzer

I hope they do the same for the vehicles.