AFTE Knowledge and Ability Factors

73.	Knowledge of the historical development of firearms design
74.	Knowledge of machining and finishing processes of tools, guns, barrels, breechfaces, extractors, ejectors, firing pins, and silencers (with emphasis on working surfaces and edges) and their effect on individuality. (Note: silencer marks are noted in module 11.)
80.	Knowledge of sources of information regarding identification markings and serial numbering systems in firearms (including locations of serial numbers, part/assembly numbers, proof marks on firearms, and the locations of hidden numbers)
98.	Knowledge of internal ballistics: ignition, pressure, function of chamber design, chamber and cartridge dimensions, headspace considerations
46.	Ability to recognize: (1) those attributes or characteristics of a particular firearm design which are reflected in the fired projectiles and fired cartridge cases; and (2) nonfirearm caused toolmarks on ammunition components
47.	Ability to determine the source and uniqueness of various striated and/or static marks on bullets and cartridges