To the gun techs

[Blackbeard01]

Okay, so I've got a b&t mp5 (pretty sure it's a rebrand of the ash, if anyone could confirm that?) Which I want to get the flashlight handguard for. Issue is the current one is tight with the smallest nimh battery I can find so it looks like it's gonna be a lipo job. I don't plan on putting a powerful battery in but I'm still pretty sure it'll need a mosfet. So my question is how do i install one? And as a bonus, I'd like one which will need or stop working when the battery gets low if anyone would be kind enough to recommend??

Many thanks in advance.

 

[Samurai]

B&T is probably Classic Army.

Go for a 7.4V lipo and you don't need a mosfet.