Gunsmiths Puns

I wasn’t suited to be a tailor and the muffler factory was just exhausting. I couldn’t cut it as a barber and I didn’t have the patience to be a doctor. I wasn’t a good fit in the shoe factory even though I put my soul into it. I got fired from the cannon factory. I had a paper shop but that folded. I just couldn’t see any future as a historian and being a plumber was just too draining.

Edit: thank you for all the outstanding suggestions of how to move forward in the comments.