These are quite common, I have bought a couple replicas for use in theatrical production, though I tend to stick with the 22 calibler guns for noise concerns. Interestingly enough, some of the manufacturers that sell replica pistols make alternate versions designed to fire small pepper spray, and cs tear gas cartridges. I have even read about versions that can fire rubber projectiles as well. The guns available in the US typically have solid barrels with gas ports located elsewhere. A Walther PP replica I have around somewhere, chambered for 9mm PAK, had a gas relief port on top of the chamber, so every shot fired shoots a flame out of the top of the gun. Also interestingly, I recall reading that England had quite an illegal gun problem with replica Russian made Makarovs being converted to accept real ammuntion, as the replicas apparently were made of the same steels and same specs as the real ones, just with solid barrels.

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