9MM Projectile Insert
thingiverse
8/6/20 Reduced width to 8.9mm for smoother extraction, securing it with super glue inside the brass for a strong hold. 28/5/2020 Refined shape and size after conducting tests, as the extractor was consistently pulling the insert out of the brass. This is a solid 9MM projectile insert designed to be pushed fully into a used brass casing to create a heavy-duty snap cap or dummy round for dry firing. The brass material handles ejection more efficiently than plastic, while the printed projectile clearly indicates that this is not a live cartridge and is easily replaceable at an affordable cost.
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