Its the case of Steyr parts are expensive, so they don't sell. They are expensive, because they don't have the volume of sales to get the cost down. They don't have the volume because of the cost. Its a nasty cycle. But they are obviously making enough money as they have been in the game for a long time. I suspect the US civilian market is decent enough as far as profits, but probably a pain in the butt to deal with. I say that as I'm in sales and deal with luxury items. A military contract is where the money is. So we get the leftovers.
I really like Steyr pistols and rifles. But I'm not paying crazy money for a threaded pistol barrel for my suppressor. Everyone else offers it at a slight cost difference. They even offers a full optic ready setup with suppressor irons and threaded barrel for a reasonable price.
Same with an AUG. I want one, but always find 2 or 3 guns to buy with my $1500-2000. I got an IWI TS12 and Norinco M14 clone (with some US parts) with my last $2k. I don't think I would trade both for an AUG. I know the AUG is an excellent gun and will eventually have one. Maybe when PSA does another blowout.