So you want to build an electric
boxmag
I get letters daily about how to do this, on every
gun you could imagine. I've posted a few how-to's but never in
this detail.
So if you have an MP7 that really, really,
needs a huge boxmag, you will have an idea of how to get
started.
I've built literally dozens of these at a time,
and they work.
And you can do it for about twenty
bucks.

Before anybody asks, NO I do not sell
the completed mag drive you see
here,
HERE is my
tutorial

just my
patterns package for most of my past products...and that
includes a mag drive pattern.
The finished item fits
into any standard US tin.