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"Micro-Stamping": Incremental Gun Prohibition Advances in California

Monday, October 29, 2007

On October 13, Arnold Schwarzenegger, governor of California, signed AB1471 into law. As of January 1, 2010, the law will define (and prohibit the sale of) any newly-designed semi-automatic pistol as an “unsafe handgun,” unless the pistol is equipped with two or more internal parts that imprint, onto the cartridge case of a fired round of ammunition, a microscopic array of characters that identify the make, model and serial number of the pistol. Despite claims by the bill’s supporters that it benefits police efforts, it wasn’t supported by statewide police groups.

The theory of “micro-stamping” is that a firearm’s firing pin or other internal parts could bear microscopic codes unique to the firearm, that could imprint the codes on fired cartridge cases, and that the codes could be entered into a computerized database before the firearm leaves the factory. Then, the theory continues, if such a gun were used in a crime, police investigators could pick up a cartridge case left at the crime scene, identify the markings on the case, run the markings against the database, and thereby identify the criminal involved.

Pistols currently approved for sale are exempt from AB1471’s micro-stamping requirement. But that could change. California has repeatedly expanded its “unsafe handgun” ban. In 2001, California defined “unsafe handguns” as those that did not pass a drop test and a live-fire/malfunction test, and that did not have certain types of mechanical safeties. In 2006, the ban was extended to semi-automatic pistols that did not have a loaded chamber indicator or a magazine disconnect. In 2007, it was extended to semi-automatic pistols that do not have an indicator and a disconnect. As noted, AB1471 extends the ban to newly-designed semi-automatic pistols that do not have micro-stamping capability.

Forecasting possible additional expansions, H.R.1874, introduced in Congress by Rep. Robert Andrews (D-N.J.), proposes to prohibit any firearm—rifle, shotgun, or handgun, semi-automatic or not, including all models now in existence and any invented hereafter—that doesn’t micro-stamp effectively with every type of ammunition, every time. Gun control supporters see micro-stamping as another way of incrementally achieving what Congress and state legislatures have not done in a single stroke—prohibit the sale of guns.1

The Numerous and Varied Problems with Micro-Stamping

Micro-stamping has repeatedly failed in tests. In 2006, a study by forensic experts and researchers at the University of California (Davis) concluded, “At the current time it is not recommended that a mandate for implementation of this technology in all semiautomatic handguns in the state of California be made.”2 Results of the study were consistent with earlier peer-reviewed tests published by the Association of Firearms and Toolmarks Examiners.3 Firearms examiner George Krivosta, of the Suffolk County, N.Y., crime lab, found that the “vast majority” of micro-stamped characters in the alphanumeric serial number couldn’t be read on “any of the expended cartridge cases generated and examined.”

Micro-stampings are easily removed. In the tests noted above, firing pins were removed in minutes, and serial numbers were obliterated in less than a minute, with household tools.

Most gun crimes cannot be solved by micro-stamping, or do not require micro-stamping to be solved. Most gun crimes do not involve shots being fired, thus there are no cartridge cases left at crime scenes for police to recover. Also, a large percentage of crimes involving guns, involve guns that don’t eject fired cartridge cases. Notwithstanding TV shows that portray crime-solving as impossible without high-technology, most crimes can be solved by traditional means. For example, of murders in which the victim-offender relationship is known, 77% involve family members, friends and other acquaintences. Only 23% involve strangers.4

Most criminals who use guns, get them through unregulated channels. According to the BATFE, 88% of of crime guns are acquired through unregulated channels, and the median time between a crime gun’s acquisition and its use in crime is 6.6 years.5 According to the Bureau of Justice Statistics, most criminals get guns via theft or the black market.6

Micro-stamping may increase gun thefts, home invasions and other burglaries, and expand the black market in guns. Criminals will be further encouraged to get guns illegally, if they believe that guns bought legally will be linked to them in a computerized database.

Most guns do not automatically eject fired cartridge cases. Revolvers can fire five or more rounds without any fired cases being ejected. Pump-action, bolt-action, lever-action and other types of guns eject fired cases only if the user manually operates the gun’s unloading mechanism. If a fired case is not ejected at a crime scene, it cannot be recovered for examination.

Only a small percentage of guns will be micro-stamped. There are about 250 million guns in the U.S. already.7 New guns sold annually account for only 2% of that total, new semi-automatic pistols less than 0.5%,8 and guns to which AB1471 applies will account for a tiny fraction, at most.

Most violent crimes are committed without guns. According to the FBI, ¾ of violent crimes, including 1/3 of murders and 3/5 of robberies, are committed without guns.9

Micro-stamping wastes money, including that which is better spent on traditional crime-fighting and crime-solving efforts. It will require a costly computerized database to track micro-stamped handguns, costs that will be passed along to all consumers, including law enforcement agencies. It will require a redesign of the handgun manufacturing process, and could require payment of licensing fees to the sole-source micro-stamping patent holder.

Problems for law enforcement. Micro-stamping exposes police departments to lawsuits if officers fire “unsafe handguns” at suspects. Departments will have to spend money destroying all cases fired in training, to prevent cases from being reused at crime scenes. Criminals can obtain fired cases from practice ranges, and use them to “seed” crime scenes, to confuse investigators.

1. Gun control supporters have also advocated empowering the Consumer Products Safety Commission or BATFE to dictate firearm manufacturing standards that no manufacturer could achieve, advocated prohibiting the manufacture of guns that do not possess gadgetry intended to identify whether the person holding the gun is its owner, and try to bankrupt gun manufacturers by suing them for damages caused by criminals who misuse guns.
2. David Howitt, et al., What Laser Machining Technology Adds to Firearm Forensics: How Viable are Micro-Marked Firing Pins as Evidence?, 2007.
3. George G. Krivosta, “NanoTagTM Markings From Another Perspective,” 38 AFTE Journal 41, 2006.
4. FBI, www.fbi.gov/ucr/cius2006/offenses/expanded_information/data/shrtable_09.html .
5. BATFE, Crime Gun Trace Reports 2000, National Report, www.atf.gov/firearms/ycgii/2000/highlights.pdf .
6. Bureau of Justice Statistics, “Firearm Use by Offenders,” www.ojp.usdoj.gov./bjs/pub/pdf/fuo.pdf .
7. National Research Council, Firearms and Violence: A Critical Review, National Academies Press, 2005.
8. BATF, “Firearms Commerce in the United States 2001/2002,” www.atf.gov/pub/index.htm - Firearms .
9. FBI, www.fbi.gov/ucr/cius2006/offenses/violent_crime/index.html.

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Established in 1975, the Institute for Legislative Action (ILA) is the "lobbying" arm of the National Rifle Association of America. ILA is responsible for preserving the right of all law-abiding individuals in the legislative, political, and legal arenas, to purchase, possess and use firearms for legitimate purposes as guaranteed by the Second Amendment to the U.S. Constitution.