5 Questions
What is the purpose of a forensic comparison microscope?
To compare microscopic scratches due to rust or imperfections
What substance acts as the spark starter or inflammable substance in firearm primer?
Mercuric Fulminate
Which type of powder is known as 'smokeless powder'?
Neutral Residue
What does the presence of carbon, sulfur, and potassium nitrate in residue indicate?
The firearm was recently fired
What is the purpose of the striker pin impression in firearm evidence analysis?
To match the impression with a specific firearm
Study Notes
Classification of Weapons
- Weapons can be classified according to loading into:
- Muzzle loaders
- Breech loaders
Types of Rifles
- RIFLED LONG Auto/Non/Semi/Service Rifle (Military weapon)
- NON-RIFLED SPORTING GUN SHORT REVOLVER (Non-automatic)
- AUTOMATIC PISTOL (automatic)
Classification of Weapons by Barrel Length
- Long gun (≥ 1m)
- Medium gun
- Short gun (≤ 25 cm)
Types of Guns
- بنادق الرش (shotgun)
- (أسلحة الطلق الناريrifle) (only long, non-automatic)
- Gaffer gun
Projectile, Missile, and Ammunition
- Projectile = Missile = Ammunition (المقذوف)
Importance of Rifling
- Reasons for rifling:
- Decrease air resistance
- Decrease specific gravity
- Increase penetration power
- Increase range or distance
Rifling Marks
- Rifling marks or primary marks help identify the:
- Class of weapon (family or type)
- Direction of twisting
- Number of grooves and lands
- Width and depth of grooves
Test your knowledge of weapon classification based on loading mechanisms and barrel length with this quiz presented by Dr. Mariam Ismail. Identify different types of weapons such as muzzle loaders, breech loaders, rifles, revolvers, and pistols, and understand how they are categorized according to their loading and barrel characteristics.
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