Patrick O'Brien made the first pistol
700.00 dollars
The circled ELG is a proofmark indicating manufacture in Belgium. If there is a crown above this mark, it would indicate proof testing after 1893, and if not it would have been earlier. Could the UMG be UMC instead? That could stand for Union Machine Company, a trade name used by Henri Pieper, Herstal, Belgium, 1877-1898.
If you mean MACHINE guns, the answer is yes.
A graphic cartoon series in 2000s with a robot that has a scarf that's machine gun barrels is the Natsume.
The original Gatling gun had six to ten barrels which rotated and fired independently. This was one of the earliest machine guns made.
Minster Machine Company's population is 550.
Minster Machine Company was created in 1896.
The Singing Machine Company was created in 1982.
Bird Machine Company was created in 1906.
Merrick Machine Company was created in 1960.
Merrow Sewing Machine Company was created in 1838.
Earlier versions had problems with the lighter barrels overheating.