Examining the effects of 3D printed projectiles on firearm identification

  • 0Division of Forensic Services, Nassau County Office of the Medical Examiner, Nassau, New York, USA.

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Summary

This summary is machine-generated.

3D printed projectiles are suitable for firearms and retain rifling marks for identification. Modifications like casting and reduced propellant enhance these marks, allowing for potential firearm linkage.

Area Of Science

  • Forensic Science
  • Materials Science
  • Mechanical Engineering

Background

  • Increasing consumer access to 3D printers enables private manufacturing of firearms and components.
  • New ammunition background check laws may drive interest in home manufacturing of ammunition.
  • 3D printed firearm components raise concerns regarding regulatory compliance and public safety.

Purpose Of The Study

  • To investigate the characteristics and forensic potential of 3D printed projectiles.
  • To determine if 3D printed projectiles can be identified to a specific firearm.
  • To assess the terminal performance of 3D printed projectiles.

Main Methods

  • 3D printed projectiles were test-fired in a firearm.
  • Ballistics analysis was conducted to examine striations and markings.
  • Projectile performance was evaluated against common obstacles and protective gear.
  • Markings from the 3D printer build plate were analyzed.

Main Results

  • 3D printed projectiles acquire class and individual rifling characteristics, enabling firearm identification.
  • Projectile markings are difficult to visualize but can be enhanced through casting.
  • Reduced propellant allows for better retention of markings.
  • Projectiles demonstrated the ability to perforate common barriers and penetrate body armor.
  • Build plate markings provide a link to the specific 3D printer.

Conclusions

  • 3D printed projectiles share significant similarities with conventional bullets in terms of forensic potential.
  • The study highlights the need for further research into the regulation and forensic analysis of 3D printed ammunition.
  • Findings indicate that 3D printed projectiles pose a potential threat due to their terminal performance and identifiability.