I never bothered with bayonets, but that one had the matching serial # bayonet and was marked ROK, (Republic of Korea) so I kept it with the rifle. It has been a while since I sold out, but if I remember correctly the left side of the receiver ring was stamped US CAL .30 This was a serious stamp and probably was done with a punch press. These guns had recut chambers and were not rebarreled. So much for not using 30-06 brass to make 7.7 brass. I never fired it, but did have a civilian convert I picked up and it did not shoot to well. Maybe you have seen the T-99's converted to .300 Savage at shows and yard sales. I had bought one once for parts and ended up using it to hunt deer. @ 100 yards with factory Remington ammo it was unbelievably accurate. I also had one recut to .308 and that shot lousy. Hit or miss on the conversions I guess. I still have one I converted to 7.62x39 and I have taken head shots on deer with that one, it so accurate. The weird thing is, I tried a couple different bullets in .311 diameter and the 150 grain .308 diameter Remingtons shoot the best. Go figure.