Can you take a stainless cane with 3 mm in diameter and drill a hole of 2 mm alongside the cane at the depth of 3 cm? It's fine if you can. Now let's take a cane with 2 mm in diameter and drill an ideal 1 mm hole at the depth of 2 cm. Mind that you don't have any power drill at your disposal but only a primitive hand brace used in 1970. Will you be successful this time? Hardly.
But there is a man who will. He has done it many many times.
He is a historian, constructor, woodcarver, jeweler and the only master making miniature copies of shotguns and cold weapon. "The Kalashnikov Gun".
Over 30 years ago Alexander Perfiliev drilled his first longitudinal hole in a miniature Mauser copy with a hand brace. In 1979 he was busy with making the first exhibit for his future collection of small-arms in miniature. It was a tiny Mauser. Some models are very complicated. Thus, it took 1 year to make a copy of the Mosin rifle. Most models are made of steel. Though, in case good material is lacking it's possible to use whatever is nearby.
Alexander's favorite model is a twisted steel sword that forms a loop. It was not easy to bend the sword to get a beautiful loop. He adores weapons but hates wars. The sword is tied up and placed into the earth saying it's time to stop wars all around the world.
What we are talking about here are models that reproduce real guns in details. These are acting mechanisms and real copies of guns decreased 4-4.5 times. They could fire if real bullets were used. Due to the lack of information on guns he used to travel much when he wanted to collect schematic pictures and drawings. Now it's all different as any kind of data is available on the net. "The British STEN Gun"