Some years ago I was creating a set of weapons digitally for some Warhammer 40,000 compatible miniatures. I used Blender for this and created a timelapse for my father so he might understand what 3D modelling entails (he seemed to be fixated on the notion that I would make a large scale physical model, scan it, and then... yeah, no idea).

The kit eventually came out and at the time of writing is available from Ramshackle Games, here: https://shop.ramshacklegames.co.uk/home/567-orc-gi-weapon-arms.html

The arms are sculpted the traditional way - I just like to do stuff like weapons this way.