A U.S. Marine posing with a captured Japanese Type 99 light machine gun with a long bayonet, Saipan, Mariana Islands, Pacific Ocean; 15 July, 1944.
   Must be awkward to be in close combat with that combination...

Bayonet on a machine gun...?

Pacific Island Fighting during World War II.

Marines on Tarawa

A slightly expanded photo of the one already posted - 
A machine gun crew of the 5th Marine Division with a Browning M1917 machine gun, firing at the enemy on the island of Iwo Jima. Empty ammunition boxes and spent shell casings all around them.; March 5, 1945.
  .