I have been considering the idea of getting a RPK parts kit as a project. However, the kits ( Romainian) I am finding don't have sights or a barrel with them. The only barrels I have located this far is for a Yugo M72. I know the M72 are a milled reciever and don't use a trunion to mount. Question is will it fit a Romanian parts kit. As far as the sights, maybe optics will work. Any thoughts?