AR-15 Magazine Chamber Flag
thingiverse
This is a chamber flag, of sorts. It fits in the mag well and engages the bolt catch, and will not allow the bolt to be closed on the chamber. The words "SAFE" appear in the dust cover opening and below the mag well. Print with 4 or more walls/bottom. A thicker/heavier print will hold up better. I have only printed it standing up so far, with good results. Use at your own risk, for airsoft only.
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