Give us all the gritty details.
The stock is a Well MB-01 Warrior 1. Not all the holes were in the correct place, if I remember correctly only the 1 at the back of the receiver was correct and the mag well is half way there :-/ I had to drill for a new mounting bolt at the front of the receiver as the original one on the mag catch cant be used
There is also a hell of a lot of grinding and dremmeling required to get the bull barrell, trigger group and mag to sit properly plus a slot for the hop adjuster to move, but nothing out of the realms of someone who does their own gun work
the mag is the standard VSR type and for the catch I just cut it out of the standard stock and screwed it to the barrel using the original bolt. The back of the mag sits inside the stock by about an 1" so that holds that end in place the front goes in like normal, as can be seen from the last pic
It all took me about 2>3 hours most of which was getting the barrel to fit without being under stress and getting the washers on the reciever bolts to the correct length so they didn't rub or jam the cylinder
I'll post pics when the paint gets done