| STOPPAGES | CAUSES | REMEDY |
| Failure to feed | Lack of lubrication of operating parts | Clean and lubricate operating parts |
| " | Defective or worn parts | Replace parts |
| " | Short recoil | See Paragraph 19 (Malfunction) Section (d.) |
| Failure to chamber | Lack of lubrication of operating parts | Clean and lubricate operating parts |
| " | Dirty chamber | Clean chamber |
| Failure to lock | Lack of lubrication of operating parts | Clean and lubricate operating parts |
| " | Dirty chamber | Clean chamber |
| " | Dirty locking recesses | Clean recesses |
| " | Weak operating rod spring | Replace spring |
| Failure to fire | Defective ammunition | Replace ammunition |
| " | Defective firing pin | Replace firing pin |
| " | Defective trigger housing group | Replace trigger housing group |
| Failure to unlock | Dirty chamber | Clean chamber |
| " | Lack of lubrication of operating parts | Clean and lubricate operating parts |
| " | Insufficient gas | Tighten gas cylinder lock screw. Clean or replace worn parts |
| Failure to extract | Dirty chamber | Clean chamber |
| " | Dirty ammunition | Replace ammunition |
| " | Broken extractor | Replace extractor |
| Failure to eject | Broken ejector spring | Replace ejector or spring |
| " | Short recoil | See paragraph 19 (Malfunction) Section (d.) |
| Failure to cock | Defective trigger housing group | Replace trigger housing group |
| " | Short recoil | See paragraph 19 (Malfunction) Section (d.) |