Okay, so if only having access to the metals lead, tin and silver, what do you guys think would be viable weapons? Would there be anything useful or would you have to wait until you get copper smelting?
Lead. Lead is boss here. Lead is cheap, plentiful and easy to shape.
Lead sling bullets would be the best use, as a regular shape, and extremely dense, you could use small bullets which would fly true and hit hard, greatly improving the accuracy of a sling, whereas you can theoretically use rock, but the natural irregularities would make it wobble and anyone with stone shaping magic would be specialists using stone shaped razor arrowheads anyway.
You have the meteor hammer...which was a lead weight on the end of a rope, which you basically swung around to build up momentum, then lash into someone's face. Its more of a performance weapon however, since its too fiddly in battles with more than a handful of people. Looks badass though.
Lead was used in clubs and spears, where you could insert small pellets of the metal to adjust the weight balance, making a heavier weapon more wieldy. People tend to think in terms of weapon size and weight, but practically speaking its
leverage. You want your hand to be holding the weapon near the fulcrum to be able to maneuver it with a minimum of effort, but the chopping/stabbing head is usually heavier than the rest of the weapon due to size alone. Solution, a lead cap on the butt of the spear restores the balance.
You could pack lead into a wood or stone mace head to increase the mass, though you do need to add counterweights to the haft if you want it to actually hit anything. Theres actually a few historical designs where they made use of freemoving lead bearings in an internal groove, to lend more power on a strike(when held at rest the lead balls are all near the hilt, but when you swing they will move to the head and theoretically add to the impact force) , though whether they are effective was in question, because the shifting mass made it a pain to learn.
Silver was too rare and too soft to be worth it as a weapon, even though it was heavy. The only times it saw use was in ceremonial weapons or ritual implements.
However, silver was prized for surgical knives, because people learned that cuts made with silver blades did not get infected as often due to its anti-microbe properties