If you REALLY need it... I had A Z T E C add it for me lol. They'll sell you anything LTC offers if you ask. You just have to be willing to shell out almost twice as much for it. XD
This is true so these bz 52/57 rifles worth brining back to original as much as I know about surplus I know nothing about these for a second when the lady pulled it from the closet I got kinda excited as at first glance it looked like a German g 43 and Iam thinking no way is it possible that three of these pass through my hands in one lifetime but it was just a vz52 lol