send parts and money first....LLLOLLL
no idea man never used em
I have one, comboed with a Magpul B.A.D. and it works great. they are a bit pricy but you can find them used a little cheaper.
I've never used one, but I can't see why I'd use a Redi-mag, for $80, when I can get a mag coupler much cheaper, it takes up the same amount of space, but less weight. Coupler+ 2 loaded 30rounders is still less than redimag+ 2 loaded 30rounders.
Just my $0.02