You can find images of almost everything here: Official USI 0.15 Content Thread

Handweapons

• M9 Buck Bayonet
• XM-177E2
• XM-177E2 Silenced
• M249 SAW
• M60
• Beretta 92FS
• M18A1 Claymore
• M19 Anti Vehicle mine
• M21 Sniper Rifle
• M14
• M67 Frag Grenade
• M16A2
• M16A2 with M203 Grenade launcher
• SMAW Anti-Tank
• FIM-92A Stinger
• MP5A1

Stationary weapons

• BGM-71E TOW 2A
• M167 VADS Vulcan Anti-Air
• M249 SAW
• M134 Minigun
• MIM-23 HAWK Anti-Air

Handweapons

• AKM Bayonet
• AKS-74U
• AKS-74U Silenced
• Al-Quds
• Browning Hi-Power
• F1 Frag Grenade
• MON-50 Anti-Personnel mine
• TM-62M Anti Vehicle mine
• Vz.61 Škorpion
• SKS Simonov
• AK-47
• AK-47 with GP30 Grenade launcher
• SA-7 Grail
• SVD Sniper Rifle
• RPG-7D Anti-Tank

Stationary weapons

• Milan 2
• ZPU-4 Anti-Air
• RPK-74
• PKM 7.62
• SA-3 Goa Anti-Air Missile System