POLYGONAL RIFLING Meaning and
Definition
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Polygonal rifling refers to a specific type of rifling pattern found in the barrels of firearms, particularly in handguns. In this rifling method, the interior surface of the barrel is not composed of traditional grooves and lands but instead consists of polygonal or rounded, non-linear grooves. The term "polygonal" refers to the geometric shapes formed by these grooves, which are often hexagonal, octagonal, or even circular in nature.
This rifling design deviates from the traditional sharp-edged, hollow "V" or "U" shaped grooves found in conventional rifling. Instead, polygonal rifling employs a smooth, rounded profile on the bore's surface, creating a continuous and uninterrupted twist. This design feature aims to enhance the projectile's trajectory, accuracy, and velocity while reducing friction and barrel fouling.
The absence of sharp corners in polygonal rifling reduces the deformation and stress on the bullet while being propelled down the barrel, minimizing the potential for deformation, jacket separation, or loss of accuracy compared to conventional rifling methods. The round-edged grooves also facilitate easier cleaning and maintenance of the barrel.
Due to these benefits, polygonal rifling has gained popularity among firearm manufacturers and shooters seeking enhanced performance and accuracy. This rifling technology is commonly found in various handguns, including semi-automatic pistols, such as Glocks, and certain revolvers.
In summary, polygonal rifling refers to a rifling technique that utilizes smooth, rounded grooves in the barrel of a firearm, aiming to improve bullet stability, accuracy, and reduce maintenance while shooting.
Etymology of POLYGONAL RIFLING
The etymology of the word "polygonal rifling" is as follows:
1. Polygonal: The term "polygonal" originates from the Greek word "polugonon", which means "many-angled" or "many-sided", derived from "polus" meaning "many" and "gonia" meaning "angle". It refers to a geometric shape that has multiple sides or angles.
2. Rifling: The term "rifling" comes from the Old French word "rifler", which means "to groove" or "to scratch". It is a technique used to create spiral grooves inside the barrel of a firearm, which imparts a spin to the projectile as it is fired.
Therefore, "polygonal rifling" describes a type of rifling in which the barrel of a firearm has grooves with polygonal or many-sided cross-sections.
