JP rifles handguard for m4 (can't find)!

Huh, good question. The PRS stock looks like it should be able to. If you tapped the forgrip and put a small 2" universal rail you could run a PEQ box. If you can't cut the butt stock put to house a battery, external would have to be the only option.

the3rdeye88 said:

Huh, good question. The PRS stock looks like it should be able to. If you tapped the forgrip and put a small 2" universal rail you could run a PEQ box. If you can't cut the butt stock put to house a battery, external would have to be the only option.

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I read a review and a video stating it doesn't hold a battery. Ugg I don't like the look of external batteries. I guess I will have to live with that.

- Topa

I thought PRS could hold a stick type batterY?

hoggie said:

I thought PRS could hold a stick type batterY?

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If you can find a source that proves it that would be great! I couldn't find anything yet.

- Topa

EDIT: GOOD NEWS! I found out it stores the battery in the buffer tube. Anyone know what size lipoly battery will fit? Do you think it could also fit a burst mosfet?

Any of these kind of lipos should work for you. http://shop.ehobbyasia.com/bb-battery/batteries/lithium-batteries/kong-power-1300mah-20c-continuous-11-1v-lithium-battery-mini-tamiya.html
NOTE:some buffer tubes are to short, causing full collapse inoperable. And stick type(such as for AKs) will not work due to the long size.
Also, I don't believe you will be able to fit a plug and play mosfet into the buffer tube as well. You can always wire one into the GB its self, which may be a better idea all together as to minimize any shock it will take from running with the rifle.