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A Foldscope is an optical microscope that can be assembled from simple components, including a sheet of paper and a lens. It was created by Manu Prakash and designed to cost less than one USD to build. It is a part of the "frugal science" movement which aims to make cheap and easy tools available for scientific use in the developing world. [2]
In matches organized by the International Practical Shooting Confederation, both steel and paper targets are used. Currently the only paper targets used for handgun is the IPSC Target (formerly Classic Target) and the 2/3 scaled down IPSC Mini Target (formerly IPSC Mini Classic Target). The center of these paper targets is called the A-zone.
The three main technologies employed for long-range shooting—the bolt-action rifle, telescopic rifle scope and machined cartridge ammunition—were developed in the nineteenth century. The first bolt-action rifle was produced in 1824 by the German firearms inventor Johann Nicolaus von Dreyse. The first documented telescopic rifle sight was ...
A flip-up barrel and lack of extractor on a Beretta Bobcat semi-automatic pistol. Some very early blowback pistols used ammunition with no rim or extractor groove on the cartridge cases (e.g., 5mm Bergmann), and such pistols, therefore, lacked extractors. The spent case was forced out of the chamber by recoil and was subsequently ejected.
Improvised versions are made by using two pipes and an end-cap; they usually fire shotgun shells. To fire the gun, the user inserts a shotgun shell into the smaller diameter pipe, places the smaller pipe into the larger diameter pipe, and forcefully slides it back until the shell's primer makes contact with a fixed firing pin located inside the ...
Initial production for the Vietnam War loaded 00 buckshot into the same red plastic cases being used for sporting ammunition and was designated: Shell, shotgun, plastic case, 12 gauge, No. 00 buck, XM162. The shells were typically packaged as twelve ten-round cardboard boxes within a metal ammunition box. [1]
Generally, scopes will have turret adjustments to allow the scope to be easily adjusted for various shooting conditions. For benchrest shooting, scopes with a second focal plane (SFP) reticle and click adjustments of 1 ⁄ 8 moa (approximately 0.036 mil) are most commonly used. Scope models with 0.025 mil and 0.05 mil adjustments are also ...
The 5.56 mm LSAT machine gun has been renamed the Cased Telescoped Light Machine Gun (CT LMG). [ 17 ] On 14 May 2014, Textron Systems was awarded a two-year $5.7 million contract for work that included development of 7.62 NATO cased-telescoped ammunition and an operating mechanism to incorporate into the LSAT machine gun to create a lightweight ...
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