[FUISTISAMOMIHI]

DOES ANYONE KNOW OF ANY SITES THAT CARRY STOCKS FOR STEYR PISTOLS.

[BattleRifleG3]

Putting a stock on a pistol makes it into a "short barreled rifle" subject to NFA registration, otherwise it's very illegal.

Having the stock alone isn't illegal, but having the stock on the same premises is questionable, so there isn't really a market in the US.