Standard Blank training cartridge equivalent to M51, may be used in standard and shorter magazines. Used with Blank Firing Attachment, it can be adjusted to all automatic weapons to provide consistent and reliable functioning.
| Normative reference | MIL-C-60616 |
| Star crimp | 6 |
| Cartridge length | 51 mm / 2 inch |
| Cartridge weight | 7.6 g / 117 gr Nominal |
| Case | Brass |
| Service temperature | -32°C to +52°C -26°F to +125°F |