In my view this is not a 2nd Amendment issue, but rather a licensing issue. Many thousands of guns guns are stolen in gun shop burglaries every year and a lot of them end up on the street being used in crimes. Having investigated gun shop burglaries, I will take an alternate position on this legislation.
Banks are required by federal law to have secure storage like safes or vaults, and alarms and video. Pharmacies are required by federal law to have secure storage for schedule drugs, and alarms and video. The ATF guide for FFL's already lays out all the measures proposed in this bill for security, although these measures are advisory. FFL's are subject to inspections. The law proposed appears to codify the security measures advised in the ATF guide. Banks, pharmacies, and gun shops are targeted by thieves because of the value of their inventory.
Every FFL knows they are a target for thieves. In my experience gun shop burglaries tend to be highly organized affairs conducted by professional criminal groups. Guns that are stolen and then fenced are intended to be used for criminal purposes. Failure of FFL's to properly secure their inventory is in my view irresponsible. Security measures do not have to be expensive. Alarms and video surveillance systems are not expensive nowadays. If the dealer does not have a safe or vault, that's just stupid. If the guns hop is not in itself a vault, the guns need to go into safes at night. These are just the cost of doing business. It is a shame that we would need a new law, but FFL's need to secure those guns. Much of what is in the bill is already required by insurance companies. I would suggest that most reputable dealers are already doing most of what's in the bill anyway.