Having worked with a ridiculous number of firearms at this point in my career, I can
attest that firearms blueprints and drawings can really come in handy when trying to diagnose and fix a malfunctioning firearm. If someone is handing you a firearm that you have never worked on before there is always going to be some sort of learning curve but one of the best ways to get started is research and this is done best with the use of things like exploded views and diagrams. If you are not familiar with the action on a specific, make and model then you may have no idea its missing a part until you start looking at the appropriate references.
Now depending on what you do next may change the type of drawing to reference. For
example, actual firearms blueprints have a ton of very specific measurements for every part.
These types of drawings are extremely detailed because they have to be for the parts shown to work together correctly. A pictorial drawing will usually show you the firearms dimensions
without confusing someone with less training. Next, we have a diagram of the firearm. These
are also known as exploded views and show every component and how they interact with each other. I love these because if I am dealing with a new firearm, it helps me spot if a part is missing.
Finally, we have sectional type firearms drawings. These are essentially drawings of sections of the firearm if it was cut in half. This type of drawing can be useful for understanding basic operations or, if it is to scale and marked correctly, can help someone determine the appropriate wall thickness of specific parts. So, in order to break it down a bit more, there are many reasons a gunsmith would use firearms drawings to complete their work. What one they use depends on personal preference and work to be completed.
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