I had a Vietnamese (Communist) conversion of a Type 38 that was given to me. Shot it once, observed the spent case, and promptly ruined it by trying a 5.56 conversion. Turns out they're fairly rare, but I didn't have a clue at the time. Currently, it's back to 7.72x39, but not as it was "as issued" to whatever low echelon peasant that had prove his loyalty.