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Bureau of Criminal Apprehension

A Division of the Minnesota Department of Public Safety

Function Testing

Firearm examiners perform testing to assess the functioning ability of a firearm.  They can test the firearm to determine if it is capable of discharging a cartridge or shotshell.  They can also evaluate the mechanical operation of a firearm when there are allegations or concerns that the firearm discharged unintentionally. 
Examiners may evaluate and test a firearm’s mechanical condition and observe if any modifications were made to the firearm.  For example, examiners can recognize a semi-automatic rifle that contains machine gun parts.  This modification causes the rifle to fire full-automatic.  Such modification has the potential to create an unsafe condition.  Automatic firearms are also regulated under state statutes.
Firearm examiners may look at reference firearms when diagnosing function problems on an evidence firearm.  The examiners can also use the reference firearms to supply missing or damaged parts to non-functional evidence firearms so they can create test specimens
Incorrect Firearm PartsRevolver without a Sideplate