TM M5 battery location

[Chigger]

When I bought my MP5 from a private person, I was told it is a TM. The battery is located under the fore grip housing. When I look at other MP5's the battery seems to be in the stock. Is this battery location correct or has it been modified?

[Joe]

Probably.  It depends on what sort of MP5 you have.   An AEG can be rewired to move a battery location.  My limited experience is the wiring usually moves the battery TO the stock to accomodate a larger battery.

If the stock is folding, collapsing or non-existent (MP5K) then there is not enough room for a battery.  The foregrip is commonly used for an interior battery compartment. 

One can also use an external battery compartment, such as a battery bag, mock PEQ box or a fake spare magazine. 

You can also duct tape a battery to your gun.  Not an aesthetically pleasing solution but one that works.

On a sidenote, a lipo battery is small.  A previous owner might have used a lipo on the gun and relocated the battery from the stock to the foregrip.  I'm not sure why someone would do this but it's within the realm of possibility.

[Chigger]

It is the model with a full stock. there is a compressed sand block weight in the stock. the hop up assembly also has a white feeder and not a black one as in some of the pictures I have seen for hop ups. The gun shoots great and accurate, but it seems to only fire in a full automatic sequence. I am to assume that there is not a semi-aoto setting although the selector switch clicks in both settings. I am just trying to find upgrades and better parts if they are available for durability and life.

[Pup]

The gun only firing in full-auto could be a few different reasons.

However, my guess would be the cut-off lever.