Rocket, FFL123 and the like are for the guys too lazy, too busy, too inconvenienced to go to ATF.gov and start reading it straight from the horses mouth. They would prefer to pay $19.99 for the Complete Idiots Guide to Being An FFL. Us Boomers remember "Cliff Notes" and Readers Digest Condensed books.......that's what you are getting from those guys. This is a serious business where oopsies can get your license revoked, where attention to detail and knowledge of timelines and certain procedures keeps you compliant.
Relying on a third party to tell you anything about firearms law or ATF regs is a huge mistake in my opinion. It's no different than taking my word or that of any other internet FFL. Verify everything. If I tell you "No, that's illegal".....I always try and cite the applicable ATF reg.
Know where to find:
ATF regulations
Rulings
Open Letters
FFL News Letters
ATF FAQ's (even though there are mistakes hidden in there)
and believe it or not....the instructions on the Form 4473. Those instructions answer 87% of the questions you would have about a firearm transfer.
All that above is free at atf.gov
Contrary to what GD thinks, ATF regs aren't complex, difficult to read and certainly not a mountain of paper.
The FFL's here at ARFcom are always delighted to help.....and costs you nothing.