It is determined by the size of the vest as well as the material used to make it (and by extension, what the armor is rated to stop). NIJ level 3A Kevlar may weigh 5 pounds (with the plates and carrier) but will only stop pistol shots (fired from a handgun-length barrel). At level 4, the rating becomes shotgun shells and larger projectiles.
Vests are usually made from multiple pieces of material stitched together. The more layers there are, the better the protection. For example, a vest with polyethylene sandwiched between two layers of cotton batting would be considered tri-laminate for stopping.22 long rifle bullets. The actual weight of a single layer varies depending on the type of fiber it is made from. Polyethylene, for example, can range in weight from 0.01 to 1.0 pound per square foot.
Kevlar is a synthetic material developed for use in military applications that is very resistant to cutting and crushing damage. It can also be used by itself or in combination with other materials to create armor that is effective against high-powered weapons. For example, Kevlar fabric can be used to make vests that are resistant to assault rifles. Kevlar weighs about 1/10th of an ounce per square yard and is typically used in articles that are not expected to withstand significant force such as clothing or vehicle interiors.
Hundreds of police enforcement and military K9s around the country require bulletproof vests. Each vest is priced at $1,400. Police can get a grant to purchase more than one for their department.
K9s are trained dogs that serve in many capacities, including crime detection, drug searches, and protection of officers. They are an important part of any police force or military unit. There are several types of K9s used by different agencies. The most common ones are narcotics detectors and security guards. A few rare breeds can detect poisonous gases, search buildings, and even find bombs.
Most K9s are trained using positive reinforcement methods such as giving rewards like food treats and toys when they perform certain actions. Some animals are trained using negative reinforcement methods such as shutting off the power supply to an area when they respond to a signal from their officer. In some cases, dogs are even given electric shocks to teach them not to bite people. Some agencies may choose to use both positive and negative reinforcement techniques during training.
K9s are usually assigned to officers who work with their dogs on a full-time basis. They live with their partners in their owners' homes and go to school once they have completed their training.
A level 1 vest will be ripped apart by a 10g with a 28 inch barrel. But it isn't the whole story. An 8-gauge is probably the largest you can obtain and is somewhat unusual. 10 g is for long-distance large birds such as geese. Cops and military carry 12 g of ammunition. So a level 1 vest would stop a.357 magnum at 20 feet.
Level 2 vests are made from thick, heavy material that would stop most common small arms fire. Level 3 vests are made from thin metal sheets with ceramic plates between them. These are used by special forces because they are light and wear resistant.
The thickness of the vest protects against 16- to 18-gauge shotguns and rifles, which are the most common weapons used by hunters to kill large animals. A level 2 or 3 vest would protect an officer from these types of attacks.
There are different levels of protection depending on what kind of weapon is used against you. Magnum revolver, you'll need a level 4 vest because there's more force behind the shot than with other weapons.
Vest with ballistic pocket knife (0.2 pound). The vest is worn beneath the officer's shirt and has a 3 pound trauma plate in front to protect him from rifle shots. According to Henderson, the trauma plate is constructed of ceramic, which is an exceptionally efficient bullet-resistant material. It is resistant to most common ammunition used by law enforcement agencies worldwide.
As you can see, a police bulletproof vest is not light weight equipment. Even though modern vests are made out of lightweight materials such as polycarbonate and titanium, they still weigh quite a bit. This means that an officer must either wear a body armor under his regular uniform or use a special outfit for wearing a bulletproof vest. In most cases, it is better for officers to wear a bulletproof vest because it provides them with more protection than just a regular uniform.
Here is a list of some of the more common components included in police bulletproof vests:
Ballistic knives: These are small tools designed to cut through certain types of ballistic glass. They are usually attached to the inside of the vest near the heart area.
Body cameras: These video recorders are worn by officers during on-duty activities to provide evidence of events that may occur. Body cameras are very useful because they allow officers to accurately report events that have happened while they were on duty.
A full suit of field armor (battle armor) typically weights between 45 and 55 pounds (20 to 25 kilograms), with the helmet weighing between 4 and 8 pounds. The weight varies depending on the type of armor used but generally speaking, it is heavy stuff. Field armor is worn by soldiers in battle. It provides protection from arrows, bullets, and other weapons and can be easily moved around during combat.
There are different types of field armor including breastplates, headgear, leg armor, and torso armor. Each piece of field armor has its own weight distribution so that the wearer is not overloaded. Some common materials used for making field armor include steel, wood, and ceramics.
In terms of price, a good-quality set of field armor can cost up to $10,000. Cheap armor can range in price from $100 to $500 while custom orders can cost more than $50,000.
A complete set of medieval armor was usually made up of several pieces that were joined together. The armor probably came in one big box like today's stereo or video systems. Unboxing videos on YouTube show how heavy these boxes are!
The shoulder armor weighed 12.2 kg in total, was impervious to both blasters and energy blades, and could survive strikes from both weapon types with just slight surface pitting. The chest plate weighed 4.8 kg, the leg armor 7.5 kg each.
Darth Vader also wore a helmet that contained a powerful light projection system that enabled him to see in the dark. The helmet itself was made up of three parts: the face mask, the skull cap, and the neck support. The face mask was constructed from several layers of heavy plastic sheets and was resistant to blaster bolts. It also featured two small red lights which gave the impression of glowing eyes to any enemies that saw it. The neck support had thick wires that went down into his shirt, where they were connected to a power source inside his costume. These wires also served as nerve endings so Vader could feel anything that was happening to his body from the waist up. The skull cap was similarly constructed from plastic and metal plates and was also resistant to heat, electricity, and poison. It included an opening that allowed Vader to see and communicate through sound waves with anyone who was alive today. The headpiece was secured to his scalp by seven bone screws that went through his hair and into his skull.