The Effects of Commercial Tempered Glass on Rifle Bullet Deflection

reportActive / Technical Report | Accession Number: ADA283575 | Open PDF

Abstract:

Since the inception of special weapons and emergency response teams into modern law enforcement units, marksman teams have been employed to provide selective firepower during contingency operations such as barricaded suspects and hostage situations. During these operations, police marksmen are frequently confronted with storefront commercial tempered glass, a significant obstacle that may deflect bullets in an unpredictable manner. This study was conducted in order to explore and quantify the deflection, stability, fragmentation, and lethality of the .308 caliber, full metal jacketed bullet. In a classic experimental design, the research determined the minimum stability distance of the round when fired through glass. This distance allows marksmen to know the closest distance they may fire a bullet through tempered glass without significant loss in accuracy. The experiment also quantified and plotted deflection at various distances and glass angles in order to create a table of deflection for when marksmen encounter tempered glass

Author(s):
Lambert, Henri C.
Author Organization(s):
AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH
Descriptive Note:
Master's thesis
Supplementary Note:
Supersedes rept. no. AFIT/CI/CIA-94-070, AD-A281 996.
Pagination:
0102

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFIT/CI/CIA-94-115
Monitor Series:
AFIT
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_7.2.1_Mitigate Lethal Effects; JCA_7.2_Mitigate; JCA_7_Protection; JCA_1.2.7_Experimentation; JCA_5_Command and Control; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_4.5.4_Requirements Definition; JCA_4.5_Operational Contract Support; JCA_5.3_Planning; JCA_1.2.1_Training; JCA_8.2.4_Leverage Capacities and Capabilities of Security Establishments; JCA_8.2_Shape; JCA_8_Building Partnerships; JCA_4.3_Maintain; JCA_1.2.5_Lessons Learned; JCA_5.2.2_Develop Knowledge and Situational Awareness; JCA_5.2_Understand
Communities of Interest:
Weapons Technologies
Descriptor(s):
*SMALL ARMS AMMUNITION, *DEFLECTION, *GLASS, *RIFLES, *TEMPERING, WEAPONS, MATHEMATICAL MODELS, METALS, STABILITY, CORES, FRAGMENTATION, EXPERIMENTAL DESIGN, PROJECTILES, HOSTAGES, ENERGY, THESES, PENETRATION, LETHALITY, LOSSES, STATISTICAL ANALYSIS, GUNS, FIREPOWER, LAW ENFORCEMENT, POLICE, JACKETS, MARKSMANSHIP
Field(s)/Group(s):
Ceramics, Refractories and Glass, Ammunition and Explosives, Guns, Electricity and Magnetism
Keyword(s):
*COMMERCIAL, EMERGENCY RESPONSE TEAM, BARRICADED SUSPECTS, 308 CALIBER GUN, DISTANCE, ROUNDS, WILCOXON TESTS, CENTER OF MASS
Report Date:
1994 Aug 01