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Modern Firearms Manufacture J. Allan Jones. “Module 03:…
Modern Firearms Manufacture J. Allan Jones. “Module 03: Modern Firearms Manufacture.” Firearm Examiner Training, National Forensic Science Technology Center, projects.nfstc.org/firearms/module03/fir_m03.htm.
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Parts Fabrication
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Low Stress-load Parts
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Small Pins, Screws, Springs: making is outsourced instead of gun manufacturers making them
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Assembly
Subassembly: used for hammers, triggers, cylinders, bolts, and slides
Final Assembly: some firearms fit right together and don't require any extra work, but some are not so simple
Final Steps
Test Firing: similar to proof testing, except with regular ammunition
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Proof Testing: ammunition with much higher pressures than normal ammunition are tested to make sure the firearm can withstand it
Preparation for Delivery: residues are cleaned off and a compound to inhibit the buildup of rust is added
Rifled Barrels
Straightening: provides pressure to areas that need it in order to make the barrel completely straight
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Contouring/Profiling: crowning the muzzle is a characteristic that can aid firearm examiners in studying unique characteristics of a firearm
Chambering and Throating: part of the bore must be made larger (makes the chamber) and another part must be made smaller (makes the throat)
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