Quoted:
Exactly how is it any of their f***ing business?
isnt
you ever see a cop at the range inspecting to see if you registed that pistol with a .22 kit installed on it as a "multi caliber" firearm?
again, if it comes down to it, where they are picking things apart like that...chances are your already super duper ultra fucked. Similar to 922R compliance. 922R compliance is easy enough to follow, just be careful when you swap any parts out on a gun you buy new/direct from a retailer or from online. Speaking of which I just passed on a Turkish MP5 clone as I know it wasnt 922R compliant, I dont need to roll the dice and take a chance, or get caught up in that sorta crap, isnt worth it.
If your slinging crack rock by the ton, pimping 14 year old kids, exporting weapons to Nigeria, then yeah....maybe they will tack on these kinda things after they look into your stuff as extra charges.
again, just my ...opinion. I tend to be realistic, and not live in fear to the extent where I wont have my FFL pin a stock for me, or where i wont own a post ban gun as it may be a "duplicate or copy" of a banned gun.