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Controversially, in 2006, cricket bats with a thin carbon-fiber layer on the back were introduced and used in competitive matches by high-profile players including Ricky Ponting and Michael Hussey. The carbon fiber was claimed to merely increase the durability of the bats, but it was banned from all first-class matches by the ICC in 2007. [37]
A free-floating barrel is one where the barrel and stock do not touch at any point along the barrel's length. The barrel is attached to its receiver , which is attached to the stock, but the barrel does not touch any other gun parts except perhaps the front sight , which is often mounted on the barrel.
Carbon 15 rifles have carbon fiber upper and lower receivers which are lighter than the standard aluminum and steel construction of AR-15 receivers. Carbon 15 rifles are generally chambered in 5.56×45mm NATO/.223 Remington, [4] although Bushmaster also produced 9×19mm Parabellum versions of the pistol and carbine. [citation needed]
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.
1989: World's first carbon fork, the EMS; 1989: Kestrel is the first company to use higher stiffness, "intermediate modulus" carbon fiber in the 200 EMS. 1989: World's first all-carbon triathlon bike, the KM40; 1992: First "modern" seat-tube-less design, the 500SCi, demonstrating the structural flexibility offered by composite construction
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