The TechnologyThe technology was developed in the 1990s by Todd Lizotte and Orest Ohar for the computer technology industry and has the intent to "Provide Make, Model, and Tracking Number At The Crime Scene". It is currently patented by Mr. Lizotte and owned by ID Dynamics.<1> Due to the high pressures present in the chamber of a firearm during firing (see internal ballistics), the cartridge case is effectively forged into the chamber, and picks up any markings, large or small, present in the chamber. This fact has long been used in the field of forensic ballistics, where marks from tooling that remain in the chamber or on the bolt face are often used to associate a cartridge case with the firearm that fired it. This method is generally called ballistic fingerprinting. Firearm microstamping technology additionally engraves the make, model, and serial number on the cartridge, and serves to identify a firearm uniquely. The identifying marks are engraved on the face of the firing pin which stamps the primer as the firing pin impacts the primer to ignite it, and as the chamber pressure pushes the cartridge against the breech face, onto the head of the cartridge as well. By marking both the replaceable primer and the reusable case, each time a case is reloaded, a new primer supplies a fresh writing surface upon which to accept the identifying engraving, although for factory-fresh cartridges, the same information will be available in legible form on both the primer and on the head of the cartridge case. Imprinting both the primer and the head of the cartridge increases the tamper-proofing, relative to just imprinting the primer, as the firing pin can easily be reworked or replaced if only it does the marking of the spent cartridge.
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Controversy n general, groups that support gun control legislation generally favor requiring ballistic imprinting on all new firearms, while groups supportive of gun rights and the Second Amendment generally oppose any legal requirement for ballistic imprinting technology. Since the technology is unproven with large scale implementation, there are no reliable statistics to substantiate how useful the process might really be to law enforcement or that it would in any way hurt these same efforts.
Claims made by proponents of the technology include:
* Microstamping enables law enforcement to match fired cartridge cases from a crime scene to at least the last registered owner of the firearm.
* Microstamping would allow law enforcement to track illegal trade in guns.
* Low cost of implementation; the technology owner claims as low as US$0.50 per firearm or as high as US $8.50, depending on the volume of the manufacturer.
* High reliability; the "nearly as hard as a diamond" firing pin provides long service life.
Claims made by the opponents of the technology include:
* Stamped casing can only be traced to the last registered owner, not to the person who used the gun when the casings were stamped. In the case of a stolen gun, as is the case for most firearms used in crime, the stamped case would not lead to the criminal.
* Unscrupulous individuals could collect discarded brass from a firing range and salt crime scenes with microstamped cases, thereby providing false evidence against innocent people and increasing the workload for investigators.<3>
* High costs for testing the efficacy of the technique must be passed on to customers, increasing the cost of firearms for those who obtain them legally.<3>
* Microstamping is easily defeated. Diamond coated files are inexpensive and will remove microstamping. Firing pins are normally replaceable and can be changed with simple tools or without tools. Firing a large number of rounds will wear down the microstamp.<3> Marked components such as slides, barrels, firing pins and ejectors are all easily and commonly replaced items.<4>
* Microstamping is an immature, sole source technology, and has not been subjected to sufficient independent testing. Transfer of microstamped marks to the cases is less reliable than proponents claim.<3>
* Microstamping would be irrelevant/non-applicable for implementation of revolvers as these types of weapons do not eject shell cases necessarily.
http://en.wikipedia.org/wiki/Firearm_microstamping