There was a discussion on this on the SASS Wire a few years back. I think it was determined to be not SASS legal. I don't recall if it was because of the 380acp chambering not being a commonly available pistol caliber, unlike the 9mm, 45acp, and some other conversions that are legal. Or it may have been because there is no provision for lowering the hammer between chambers, which would make it a 4-shooter (although that might be legal if you loaded the 5th on the clock - I don't recall).