.223 Safety plugg
thingiverse
This is a Safe For Work variant of my not so Safe For Work plug (https://www.thingiverse.com/thing:2663548) This version also incorporates a text warning. Print it with the text side down if you have good surface quality on the bottom side of your prints, otherwise print it with supports for the text and have the "non-mirrored" text facing up. Use supports for the main body since it's tapered to fit the .223 cartridge-seat.
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