Is there any way to spawn in weapons?

[Unbiased Ear]

I locked myself out of an iconic pistol I wanted and I don't want to go back 15 hours or start a new playthrough.

[PerLindstrom]

If you play on PC you can do it by a console command.
https://www.nexusmods.com/cyberpunk2077/mods/107
Do you have the name of the pistol?

[WHEREAMI]

There is a shop in Dog Town that sells iconic weapons that you missed, not sure if all of them tho

[kripcision]

yeah get Cyber Engine Tweaks then get the mod Simple Menu which can add any item you want. you could just find the commands yourself from a list but simple menu is simple (lol)

cyber engine tweaks is required to do console commands tho.

CET
https://www.nexusmods.com/cyberpunk2077/mods/107
CONSOLE COMMANDS
https://www.nexusmods.com/cyberpunk2077/mods/521
SIMPLE MENU
https://www.nexusmods.com/cyberpunk2077/mods/818