I bought this projectile off eBay on a whim, and it arrived the other day. I have yet to be able to find anything that resembles it so I am kinda stuck.
It came from Croatia, and is made of plastic with possibly a concrete “core” in it. Some dust can be seen in the nose when put up to a light, and cracks in the substance can also be seen.
The markings are nearly all gone but the font looks similar to the font found on Yugoslavian ammunition. Only readable markings is “20mm” “A1” and “MA”.
Weight: 72g / 2.5oz
Could be some type of break-up projectile or maybe a dummy projectile?