OK this has been in before but I am very new at the AR15 world and want to double check.  How many evil features can be on a Post-ban lower?  I got one today and would like to know what I can install on it.

One evil feature of your choice.  can be any [b]one[/b] of the following..
pistol grip
flash suppressor or threaded barrel...
bayonet lug
folding / collapsible stock

I'm thinking you want to keep that pistol grip, if that’s the case then you are done when it comes to evil features.  Now there are plenty of none evil features to chose from...
Muzzle brakes / fake flash suppressors
Fake collapsible stocks
Maybe a filled in bayonet lug?