Buying guns and ammo

[imported_Telpierion]

have a lockbox (for handguns) and must have the receipt to prove it and bring the lock box on pickup ...Unfortunately, most of the gun-locks that are given out at police stations are not on the approved list on Firearms use limitation devices list.

You don't need to bring a lock box in just the receipt. And the project child safe locks, the only ones I'm aware of being distributed at PDs, are on the approved list.

Project ChildSafe 278 GL710-NSSF Taiwan R.O.C. Cable Lock
Compliance with this law can be met by utilizing this device with the firearms or types of firearms described below. The device
manufacturer has indicated that this device will properly function with the following:
Auto-loading rifles, bolt action rifles, pump action shotguns, semiautomatic shotguns, double action revolvers, single action revolvers,
auto loading pistols, single shot rifles, single shot shotguns, and single shot pistols, with barrels, chambers and/or openings large
enough to accept a 0.265 inch cable.