Earlier quoted context omitted.
> SBRs (real pia to get for non-leo) It's not that bad. The easy way is to find an SBR you want to buy, file Form 4 for $200, wait for a few months, then take receipt of your NFA item. Or if you want to do a conversion from an existing rifle, file Form 1 (also $200) and get short barrel. The disadvantage is that you've then created an NFA weapon, so you'd have to be more careful how you handle transfer and sale. If y…
> If you have a forward grip but don't have the tax stamp, you'll go to prison. Incidentally, I'm pretty sure this applies even if the grip isn't attached, or is attached to another gun. All depends on how friendly the ATF is feeling...
I think it's unlikely (but possible) a case would be brought against you for just having the grip, and I'm not sure if that's ever actually happened. As opposed to if you had all the parts to make a machine gun, where there could only be one use for those parts.
Also interesting, drilling the extra hole in your AR-15 lower so that it could some day accept an auto-sear is a serious felony, even if you don't own the auto-sear.
I'm fascinated by how insane these rules are after I learned that I can't legally own or operate a firearm because I'm a medical marijuana user. If cannabis ever gets unscheduled, I'd like to build a little arsenal.