How to remove the end cap.
Place the butt stock end cap in a vice and pull apart (It may help to wiggle the
stock a little whilst pulling-click to see
cardboard or similar between the jaws of the vice and the
butt stock end cap to avoid scratching the end cap, and do
NOT over tighten the vice.
that there are some types of stock that disassembles in
other ways than this, or not at all. Examples are the
later type HK33/MP5 stock which doesn't disassemble, and
MSG 90, PSG-1 and also other produces than HK or HK
licensees, e.g. Cetme.
Note: You do this on your own risk, and if you somehow
manages to break or otherwise ruin your stock, well that
is your problem. If you are not 100% sure about how to do
this, don't do it, or pay someone competent to do it for