The Motor Machine Gun Service was organised into Motor Machine Gun Batteries as part of the Royal Field Artillery. All personnel became part of the Motor Machine Gun Corps on their formation.
The strength of the Machine Gun Corps (Motor) was recorded from January, 1915, until March, 1920, on a month-by-month basis.
At its peak, in April, 1915, it consisted of 141 officers and 3,758 other ranks - a total of 3,899 all ranks. A more detailed analysis is available on the MGC strength page.
| Battery | Attached Unit | Theatre | Date in theatre | Notes |
| 1st | France & Flanders | Spring 1915 | ||
| 2nd | France & Flanders | Spring 1915 | ||
| 3rd | France & Flanders | Spring 1915 | ||
| India | March 1918 | |||
| 4th | France & Flanders | Spring 1915 | ||
| 5th | France & Flanders | Spring 1915 | ||
| 6th | France & Flanders | Spring 1915 | ||
| 7th | France & Flanders | Spring 1915 | ||
| 8th | France & Flanders | Spring 1915 | ||
| 9th | France & Flanders | Spring 1915 | ||
| 10th | France & Flanders | Summer 1915 | ||
| 11th | France & Flanders | Summer 1915 | ||
| 12th | France & Flanders | Summer 1915 | ||
| Italy | November 1917 | |||
| 13th | France & Flanders | Summer 1915 | ||
| 14th | France & Flanders | Summer 1915 | ||
| 15th | France & Flanders | Summer 1915 | ||
| India | March 1918 | |||
| 16th | France & Flanders | Summer 1915 | ||
| 17th | France & Flanders | Summer 1915 | ||
| Egypt | April 1916 | |||
| France & Flanders | March 1918 | |||
| 19th | India | March 1918 | ||
| 20th | ||||
| 21st | ||||
| 22nd | India | March 1916 |