I take it for granted that you are looking for a techinal drawing of the Soviet Cup Grenade Launcher. I have a friend that has the Russian manual on the operation of this G/L and there might be a better techinal drawing of the Launcher that he can send you a copy. There is also a spigot launcher that was used in Vietnam based on a copy of the M-7 U.S.Carbine grenade launcher and sights. I can send you pictures of this type as I have three types in my collection. Send me your direct e-mail and I will forward the pictures to you.