| CALIBER QUANTITY PER RIFLING TURN | 1 TURN IN 30.000 CALIBERS1 TURN IN 30.000 CALIBERS |
| FSC APPLICATION DATA | MACHINE GUN,CAL..50 |
| GROOVE WIDTH | 0.135 INCHES MINIMUM AND 0.135 INCHES MINIMUM AND 0.140 INCHES MAXIMUM0.140 INCHES MAXIMUM |
| LAND WIDTH | 0.044 INCHES NOMINAL0.044 INCHES NOMINAL |
| OVERALL LENGTH | 45.000 INCHES NOMINAL45.000 INCHES NOMINAL |
| MATERIAL | STEEL |
| RIFLING DIRECTION | RIGHT-HANDRIGHT-HAND |
| RIFLE BORE GROOVE QUANTITY | 88 |
| SIZE DESIGNATION | .50 CALIBER.50 CALIBER |
| SPECIAL FEATURES | C/O BARREL P/N 7161813 BARREL LINER P/N 7312560 LINER RETAINER P/N 7312561 AND PIN P/N 7265157 BARREL HARDNESS,ROCKWELL C SCALE 30-36 BARREL LINER HARDNESS,ROCKWELL C SCALE 22-34 LINER RETAINER HARDNESS,BRINELL 277-331C/O BARREL P/N 7161813 BARREL LINER P/N 7312560 LINER RETAINER P/N 7312561 AND PIN P/N 7265157 BARREL HARDNESS,ROCKWELL C SCALE 30-36 BARREL LINER HARDNESS,ROCKWELL C SCALE 22-34 LINER RETAINER HARDNESS,BRINELL 277-331 |
| WEAPON MODEL NUMBER | M2M2 |
| WEAPON SIZE DESIGNATION | .50 CALIBER.50 CALIBER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-C-320 CLASS 2A FED SPEC SINGLE TREATMENT RESPONSE INSIDE |
| SURFACE TREATMENT | CHROMIUM INSIDE |
| SURFACE TREATMENT | PHOSPHATE MANGANESE OUTSIDE |