The test is pretty easy. Most of it is common sense.
I did the free test few tears ago.
Home study. Watch a few videos onlinee. Fill out a workbook that you handed in before taking test.
Schedule your test far in advance. As others said they do fill up fast.
Thanks all.. I'll probably go with the O ring method if the lower doesn't have a dedicated threaded screw hole for tension adjustments. All my rifles now have the screws and I know the aero lowers has it but unfortunately Andersons do not...and the Anderson's are the only ones I know are available at some shops near me.
Either way, the costs for any new lowers are a joke nowadays and I'm in no dying need for them now...just looking to see if anyone has a used (or new) one they're looking to unload at a reasonable price to someone local.