Aircraft .50 ammo box

[fert]

Hello,
Anyone could help me to ID this box?
I think used for aircraft ammo, but is quite small, maybe for flexible mount?
Again, what L.H. GUN means please?
best regards

 

[HAZORD]

Browning 50 cal Machineguns can be configured to feed from the left hand side or the right hand side depending how they might be mounted and if there is another one right next to them.

 

[TimG]

The .50 Browning can be configured to feed from the left or right. The belt needs to loaded correctly according to direction of feed. L.H. will be Left Hand.

TimG

Hazord beat me to the answer!

 

[HAZORD]

Truth is truth no matter what time it is.