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Laser Sight
A laser sight is a device attached or integral to a firearm to aid target acquisition. Unlike optical and iron sights where the user looks through the device to aim at the target, laser sights project a beam onto the target, providing a visual reference point. Although lasers in the visible part of the spectrum are most common, invisible infrared (IR) lasers may be used in conjunction with a night vision device. As they are offset from the barrel, laser sights need to be zeroed in, much like a conventional sight, so that the beam intercepts the point of impact at a chosen distance. Devices may include one or both types of laser, with some models also incorporating a rangefinder, flashlight A flashlight ( US, Canada) or torch ( UK, Australia) is a portable hand-held electric lamp. Formerly, the light source typically was a miniature incandescent light bulb, but these have been displaced by light-emitting diodes (LEDs) since the ..., or IR illuminator. Laser sights may be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAR 21 Rifle
The SAR 21 ("Singapore Assault Rifle - 21st Century") is a bullpup assault rifle designed and manufactured in Singapore, chambered for the 5.56x45mm cartridge. First revealed and subsequently adopted by the Singapore Armed Forces (SAF) as its standard service weapon in 1999, it was designed and developed over a four-year period to replace the locally license-built M16S1 by the Ministry of Defence (MINDEF), Singapore Army and the former Chartered Industries of Singapore (CIS), presently ST Engineering Land Systems. Many of its design features are directly intended to address the weaknesses of the M16S1 as encountered operationally by some infantrymen. The rifle is being sold for export use aside from domestic use. In the United States, it was marketed by ST Kinetics via its American subsidiary, VT Systems. The SAR 21 is set to be replaced by the BR18 in the Singapore Armed Forces in the near future. History and development Since the mid-80s, the SAF had an outstanding requir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taser
A taser is an electroshock weapon used to incapacitate people, allowing them to be approached and handled in an unresisting and thus safe manner. It is sold by Axon, formerly TASER International. It fires two small barbed darts intended to puncture the skin and remain attached to the target, at . Their range extends from for non-Law Enforcement Tasers to for LE Tasers. The darts are connected to the main unit by thin insulated copper wire and deliver a modulated electric current designed to disrupt voluntary control of muscles, causing "neuromuscular incapacitation." The effects of a taser may only be localized pain or strong involuntary long muscle contractions, based on the mode of use and connectivity of the darts. Tasers are marketed as less-lethal, since the possibility of serious injury or death exists whenever the weapon is deployed. At least 49 people died in the US in 2018 after being shocked by police with a Taser. The first taser conducted energy weapon was i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cartridge (firearms)
A cartridge or a round is a type of pre-assembled firearm ammunition packaging a projectile (bullet, shot, or slug), a propellant substance (usually either smokeless powder or black powder) and an ignition device (primer) within a metallic, paper, or plastic case that is precisely made to fit within the barrel chamber of a breechloading gun, for the practical purpose of convenient transportation and handling during shooting. Although in popular usage the term "bullet" is often informally used to refer to a complete cartridge, it is correctly used only to refer to the projectile. Cartridges can be categorized by the type of their primers – a small charge of an impact- or electric-sensitive chemical mixture that is located: at the center of the case head (centerfire); inside the rim ( rimfire); inside the walls on the fold of the case base that is shaped like a cup (cupfire, now obsolete); in a sideways projection that is shaped like a pin (pinfire, now obsolete); or a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boresight (firearm)
Boresighting is a method of visually pre-aligning a firearm barrel's bore axis with the target, in order to more easily zero the gunsight (optical or iron sights). The process is usually performed on a rifle, and can be accomplished either with the naked eye, or with a specialized device called a boresighter. Optical boresighting Optical boresighting, also referred to as "eyeball boresighting", as the name suggests, involves using the naked eye and the bore axis of a firearm to dial in the sights of a firearm. Based on the type of firearm the procedure for optical bore sighting will vary. For AR style rifles the upper receiver can be dropped from the lower receiver and the bolt carrier group (BCG) can be removed exposing a clear line of sight through the barrel. With the upper receiver fixed in place you can then co-witness thorough the barrel and the sights on the top of the rifle, while doing this you can visually align the bore axis with the sights on a desired target. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flickr - Israel Defense Forces - Nachal Brigade Reconnaissance Battalion In "Commando" Training (2)
Flickr ( ; ) is an American image hosting and video hosting service, as well as an online community, founded in Canada and headquartered in the United States. It was created by Ludicorp in 2004 and was a popular way for amateur and professional photographers to host high-resolution photos. It has changed ownership several times and has been owned by SmugMug since April 20, 2018. Flickr had a total of 112 million registered members and more than 3.5 million new images uploaded daily. On August 5, 2011, the site reported that it was hosting more than 6 billion images. Photos and videos can be accessed from Flickr without the need to register an account, but an account must be made to upload content to the site. Registering an account also allows users to create a profile page containing photos and videos that the user has uploaded and also grants the ability to add another Flickr user as a contact. For mobile users, Flickr has official mobile apps for iOS, Android, and an op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coreolis Effect
In physics, the Coriolis force is an inertial or fictitious force that acts on objects in motion within a frame of reference that rotates with respect to an inertial frame. In a reference frame with clockwise rotation, the force acts to the left of the motion of the object. In one with anticlockwise (or counterclockwise) rotation, the force acts to the right. Deflection of an object due to the Coriolis force is called the Coriolis effect. Though recognized previously by others, the mathematical expression for the Coriolis force appeared in an 1835 paper by French scientist Gaspard-Gustave de Coriolis, in connection with the theory of water wheels. Early in the 20th century, the term ''Coriolis force'' began to be used in connection with meteorology. Newton's laws of motion describe the motion of an object in an inertial (non-accelerating) frame of reference. When Newton's laws are transformed to a rotating frame of reference, the Coriolis and centrifugal accelerations appear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AN/PEQ-2
The AN/PEQ-2 Infrared Target Pointer/Illuminator/Aiming Light (ITPIAL) is a laser sight for use on rifles fitted with a Picatinny rail. It was manufactured by Insight Technology. History The AN/PEQ-2 succeeded the AN/PAQ-4C, which was designed in the early 1990s after the Persian Gulf War. It was widely used by US forces during the war in Afghanistan and the Iraq War. The device is still seeing active service but is being withdrawn and replaced amongst U.S. Armed Forces. It was also part of the U.S. SOPMOD kit, though the device is being replaced by the new smaller LA-5/PEQ. Operation The AN/PEQ-2 has two infrared laser emitters—one narrow beam used for aiming the rifle, and one wide beam used for illuminating targets, like a flashlight. The beams can only be seen through night vision goggles. Each beam can be zeroed independently, and the illuminator's radius is adjustable. The two lasers are tied into one 6-mode switch, which has the following modes: Turning the mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gun Safety
Gun safety is the study and practice of using, transporting, storing and disposing of firearms and ammunition, including the training of gun users, the design of weapons, and formal and informal regulation of gun production, distribution, and usage, for the purpose of avoiding unintentional injury, illness, or death. This includes mishaps like accidental discharge, negligent discharge, and firearm malfunctions, as well as secondary risks like hearing loss, lead poisoning from bullets, and pollution from other hazardous materials in propellants and cartridges. There were 47,000 unintentional firearm deaths worldwide in 2013. History Accidental explosions of stored gunpowder date to the 13th century in Yangzhou, China. Early handheld muskets using matchlock or wheel lock mechanisms were limited by poor reliability and the risk of accidental discharge, which was improved somewhat by the introduction of the flintlock, though unintentional firing continued to be a serious draw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dry Fire
Dry firing is the practice of simulating the discharge of a firearm without any live ammunition, or practicing with an inert laser/infrared training platform and may also include the use of a target/feedback system. The terms also commonly refers to simply "firing" a gun that has no ammunition in it. Concern is commonly expressed that doing so might damage the gun. Dry fire does not pose any real risk of damage to most modern centerfire firearms; however, it can for rimfire weapons, where the firing pin in most designs will impact the breech face if the weapon is dry-fired. Because of this, precautions (such as the use of snap caps) are recommended if such a weapon is to be deliberately dry-fired. Purpose Dry firing is the practice of simulating the discharge of a firearm without any live ammunition, or practicing with an inert laser/infrared training platform such as an iMarksman or SIRT training pistol, and may also include the use of a target/feedback system, such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gas Mask
A gas mask is a mask used to protect the wearer from inhaling airborne pollutants and toxic gases. The mask forms a sealed cover over the nose and mouth, but may also cover the eyes and other vulnerable soft tissues of the face. Most gas masks are also respirators, though the word ''gas mask'' is often used to refer to military equipment (such as a field protective mask), the scope used in this article. The gas mask only protects the user from digesting, inhaling, and contact through the eyes (many agents affect through eye contact). Most combined gas mask filters will last around 8 hours in a biological or chemical situation. Filters against specific chemical agents can last up to 20 hours. Airborne toxic materials may be gaseous (for example, chlorine or mustard gas), or particulates (such as biological agents). Many filters provide protection from both types. The first gas masks mostly used circular lenses made of glass, mica or cellulose acetate to allow vision. Glass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballistic Shield
Ballistic shields, also called tactical shields or bulletproof shields, are protection devices deployed by police, paramilitaries, and armed forces that are designed to stop or deflect bullets and other projectiles fired at their carrier. Ballistic shields also protect from less serious threats such as thrown items. Ballistic shields are similar to riot shields, but offer greater protection and are typically used by special units or in situations where riot shields would not offer adequate protection. Overview Shields small enough to be carried by a single person may be termed "personal shields", and may be carried in police cars in the United States as standard equipment. Whether or not a shield is used will depend on both policy and the individual situation. It may be the policy of a police force to use shields only in defensive situations, such as establishing a perimeter and waiting for reinforcements, while others may permit their usage in offensive situations, such as high r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Point Shooting
Point shooting, also known as target- or threat-focused shooting, intuitive shooting, instinctive shooting or subconscious tactical shooting, is a practical shooting method where the shooter points a ranged weapon (typically a revolver or semiautomatic pistol) at a target without relying on the use of sights to aim. Emphasis is placed on fast draw and trying to score preemptive hits first. In close quarters combat, where life-threatening situations emerge very quickly, sighted marksmanship techniques become risky, so advocates of point shooting emphasize a less sighting-oriented style that prioritizes the tactical advantages of quick fire superiority and suppression. Point shooting is also a technique used by trained archers and marksmen to improve general accuracy when using a bow, crossbow, firearm or other ranged weapon. By developing a muscle memory for a given weapon, the shooter can become so accustomed to the weapon's weight and balance in its typical shooting position a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
