AR15 chamber flag

I over designed a chamber flag for the AR15 that can be inserted when the barrel is empty. The chamber flag is printed in ABS and an Infill of 50%. The design is able to withstand the bolt going forward if the bolt release is tripped. The long shaft is wide enough that it won't fit in the barrell if it does break off. This is only to be used to indicate there is not a shell in the chamber. Do not use on a warm barrel or recently fired barrel, plastic build up on a warm barrell will cause issues with the operation of the firearm. To be used as for DISPLAY ONLY.