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Conventional eight groove rifling on the left, and octagonal polygonal rifling on the right. Polygonal rifling (/ p ə ˈ l ɪ ɡ ə n əl / pə-LIG-ə-nəl) is a type of gun barrel rifling where the traditional sharp-edged "lands and grooves" are replaced by less pronounced "hills and valleys", so the barrel bore has a polygonal (usually hexagonal or octagonal) cross-sectional profile.
CornerShot is a weapon accessory created by Lt. Col. Amos Golan of the Israeli Defense Forces in cooperation with American investors. [1] It was designed in the early 2000s for use by SWAT teams and special forces in hostile situations usually involving terrorists and hostages.
Rifling of a 105 mm Royal Ordnance L7 tank gun Conventional rifling of a 90 mm M75 cannon (production year 1891, Austria-Hungary) Rifling in a GAU-8 autocannon. Rifling is the term for helical grooves machined into the internal surface of a firearms's barrel for imparting a spin to a projectile to improve its aerodynamic stability and accuracy.
An interior or exterior corner, with an angle or type of bevel, is called a "chamfer". Fillet geometry, when on an interior corner is a line of concave function, whereas a fillet on an exterior corner is a line of convex function (in these cases, fillets are typically referred to as rounds
Jian (middle) depicted in Chinese military compendium Wujing Zongyao. The jian (simplified Chinese: 锏; traditional Chinese: 鐧; pinyin: jiǎn) or tie tian (鐵鐧 or 鐵簡, lit. 'iron slip'), also known as Chinese swordbreaker or Chinese truncheon, [1] is a type of quad-edged straight mace or club specifically designed to break weapons with sharp edges.
A Sturmgewehr 44 with 90 degree Krummlauf The Krummlauf on display at the Bundeswehr Museum of German Defense Technology in Koblenz, Germany.. The Krummlauf (English: "curved barrel") is a bent barrel attachment for the Sturmgewehr 44 (StG 44) rifle developed by Germany in World War II.
The base of the cone is slightly smaller in diameter than the cylinder, leaving a sharp shoulder. The flat nose punches a clean hole in the target, rather than stretching/tearing it like a round nose bullet would, and the sharp shoulder enlarges the hole neatly, allowing easy and accurate scoring of the target.
Used not only to block strikes and missiles but also swung outwardly (or in quick upward motions) to strike an opponent. Also used to rush an opponent (known as shield bashing). Some shields had spikes, sharp edges, or other offensive designs. Aspis, oplon (Greek) Buckler (European) Clipeus (Roman, Greek) Dhal (Indian)