Vlimmeren,
I'm a little late in getting back to you on this subject. Sorry. But shooting the artillery with the stock still attached to the holster is possible. But getting that stock cup off off so that you can attach the stock to the pistol is really tough. Its a tight fit. Maybe that is why it is so difficult to find those cups. The soldiers just threw them away or just cut the cup off so that they could attach the stock faster in combat.
Big Norm

If needed, I have a good supply of the reddish brown leather repro lug caps with strap @$25 postpaid. Also have most other LPO8 repro leather parts avaiable. hellerarms@webtv.net