I think my C&R firearms number upwards of 50. Non are recorded in my bound book with an FFL number. Only the name, and address of the distributor I bought them from. A dealer FFL is only required on the disposition side of the bound book. That is if you sold the gun to a dealer. If sold to a non-dealer name, and DL or other identifying number is required.
Cheapshooter's rules of gun ownership #1: NEVER SELL OR TRADE ANYTHING!