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Polymer80, Inc. was an American manufacturer of parts kits containing firearm parts including unfinished receivers (also known as "80 percent" receivers) used for making privately made firearms. The company was founded in 2013 by Loran Kelley Jr. and David Borges and was headquartered in Dayton, Nevada .
A disassembled Mauser action showing a partially disassembled receiver and bolt. In firearms terminology and at law, the firearm frame or receiver is the part of a firearm which integrates other components by providing housing for internal action components such as the hammer, bolt or breechblock, firing pin and extractor, and has threaded interfaces for externally attaching ("receiving ...
A number of different methods are used to evaluate a polymer's resistance to environmental stress cracking. A common method in the polymer industry is use of the Bergen jig, which subjects the sample to variable strain during a single test. The results of this test indicate the critical strain to cracking, using only one sample. [5]
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The penetrating ability of its .52-caliber ball for the rifle was only one-third of that of the muzzle-loaders, and the muzzle velocity of the carbine was 25 percent lower than that of the Jenks carbine, despite having similar barrel lengths and identical 70-grain powder charges.
This provides 1,500 ft⋅lbf (2,000 J) of muzzle energy, about 50% more than commercial .44 Magnum loads, showing the .480 Ruger's good efficiency with the heavy bullets. The lower velocities and lower pressures mean the .480 Ruger has less felt recoil and muzzle blast than the higher-pressure super-magnums.
On average, about 38% of the Lower 48 has snow on the ground on Christmas, according to 21 years of data compiled by the NOHRSC. Since 2003, those percentages have varied widely from year to year ...
November 7, 2024: Fed lowers benchmark rate by quarter point — second cut since March 2020. At the conclusion of its seventh and penultimate rate-setting policy meeting of 2024 on November 7 ...
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