This shows the location of all 77 weapons crate throughout the run. If you find one I missed, let me know, but otherwise, this should be final.

Video:

SF1 Box% Level 1: Georgia Street M-16 (2), Sniper Rifle, Grenades (2), Shotgun, M-79 (2) Level 2: Destroyed Subway (0) Level 3: Main Subway Line (0) Level 4: Washington Park - Shotgun, M-16, Grenades, 9mm Level 5: Freedom Memorial - M-16, Shotgun Level 6: Expo Center Reception - HK5, Combat Shotgun, G18, K3G4 Level 7: Expo Center Dinorama - K3G4 Level 8: Rhoemer’s Base - Gas Grenades (2), Nightvision Rifle, Combat Shotgun Level 9: Base Bunker - PK102, Grenades (2), Gas Grenades, Combat Shotgun, NVision, 9mm, Sniper Rifle Level 10: Base Tower - PK102 (2) Level 11: Base Escape - M79, PK102 Level 12: Rhoemer’s Stronghold - Sniper Rifle, Gas Grenades (2), PK102, K3G4 (2), G18, Shotgun, M79 Level 13: Stronghold Lower Level - Shotgun, Gas Grenades, .45, PK102, G18, PK102, K3G4 Level 14: Stronghold Catacombs - 9mm, Shotgun (2), G18 (2), PK102, K3G4 Level 15: Pharcom Warehouses - Viral Scanner, M79, Grenades (2), BIZ-2, K3G4 Level 16: Pharcom Elite Guards- Sniper Rifle, BIZ-2, M79, Grenades, Combat Shotgun Level 17: Warehouse 76 - Sniper Rifle, Combat Shotgun, BIZ-2, M79 (3) Level 18: Silo Access Tunnels - K3G4, M79 Level 19: Tunnel Blackout - Nvision (2) Level 20: Missile Silo - K3G4 (2), Gas Grenades