New item released by X-Fire/PDI-Japan made specifically for the Tokyo Marui AK-47... "Made of CS (carbon steel), CNC all machined & black Oxide. If you want to be more realistic, we recommend to use a lacquer finished over black oxide & 14mm CCW. This is for the TM AK47 front sight as RPK74. We make it as real hider,so inner diameter is smaller than AK47 because real RPK74 is for 5.45mm cartridge. If you install this one on Tokyo Marui's AK, BB will go straight, but for other makers' AK replicas, we cannot guarantee."