Just thought I'd post for fun a list of readily available, open-world CET teleport locations to iconic weapons, without any mission or progress requirements. This may be an ongoing post.

These are all freely obtained throughout the game, without affecting any mission. So they can safely be picked up even before rescuing Sandra Dorsett during the intro mission.

"Guts" - Rebecca's shotgun from Edgerunners (requires patch 1.6):
Game.TeleportPlayerToPosition("-1458.282","-121.440384","31.13163")

"Genjiroh" (Arasaka estate - careful, there are enemies around the building):
Game.TeleportPlayerToPosition("289.2363","1035.6226","225.92569")
Second Genjiroh requires mission "Play It Safe".

Cottonmouth (Fingers):
Game.TeleportPlayerToPosition("-563.9425","797.6744","24.900467")

Prototype Shingen: Mark V (care the mine inside the trailer):
Game.TeleportPlayerToPosition("-316.9404","-1422.386","7.5999985")

Tsumetogi:
Game.TeleportPlayerToPosition("-694.048","837.14453","327.3165")

Death and Taxes (aka Second Opinion):
Game.TeleportPlayerToPosition("-656.5038","798.4439","132.28801")

Satori, Kongou and Plan B (and others) are found in the open world, but does have mission requirements (I have checked).

Coordinates to your apartment to get back out of the otherwise closed areas:
Game.TeleportPlayerToPosition("-1397.306274","1278.067749","123.076935")

EDIT:
I know it would be much simpler to just use the CET item codes, but I find this way more fun. :)