Wanted to get the jack burton tac9 look for my aap01 for a while and this does the trick nicely, handy back up mag if needed or for a quick change, good quality item which fitted nicely on my scorpion upper, for this build it's a mamba upper and I whilst it fitted fine I choose to dremel the edges to get a closer fit, the ctm mag end finishes it of nice and have just ordered another set for my scorpion build. I have tried a few but this kit works solid and very comfortable.