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  2. Polymer80 - Wikipedia

    en.wikipedia.org/wiki/Polymer80

    The first project undertaken by the company was an injection molded AR-15 rifle lower receiver. The company then moved to AR-10 style rifle lower receivers, and finally pistol receivers. [14] The name of the company refers to the injection molding process combined with the common designation of unfinished receivers as "80% receivers". [14]

  3. Receiver (firearms) - Wikipedia

    en.wikipedia.org/wiki/Receiver_(firearms)

    A disassembled Mauser action showing a partially disassembled receiver and bolt. In firearms terminology and 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 ...

  4. Rockwell International - Wikipedia

    en.wikipedia.org/wiki/Rockwell_International

    General purpose UK-specification electric drill for home/hobby use purchased circa 1980 fitted with UK-standard BS1363 plug-top. Boston-born Willard Rockwell (1888–1978) made his fortune with the invention and successful launch of a new bearing system for truck axles in 1919.

  5. CheyTac Intervention - Wikipedia

    en.wikipedia.org/wiki/CheyTac_Intervention

    Higher muzzle velocity extends the effective range of a rifle, everything else being equal. The M200 CIV version was a marginally de-rated Mil Spec M200 with a 500 yard shorter effective range, this version was soon discontinued, and the 29 inch fully accurized version is the only version available for sale. [8]

  6. Forging - Wikipedia

    en.wikipedia.org/wiki/Forging

    Forging a nail. Valašské muzeum v přírodě, Czech Republic. Forging is one of the oldest known metalworking processes. [1] Traditionally, forging was performed by a smith using hammer and anvil, though introducing water power to the production and working of iron in the 12th century allowed the use of large trip hammers or power hammers that increased the amount and size of iron that could ...

  7. SA80 - Wikipedia

    en.wikipedia.org/wiki/SA80

    A bullpup conversion of the AR-15 was previously considered but the buffer tube in stock prevented the idea from reaching fruition. [ 11 ] Technically, in the mid-1970s, the 4.85×49mm round was seen as superior to the then existing version of 5.56mm M193 round in use by the US (for the M16/M16A1 ) and by other forces.

  8. Gun ownership - Wikipedia

    en.wikipedia.org/wiki/Gun_ownership

    Some studies suggest that higher rates of gun ownership are associated with higher homicide rates, [11] [12] [13] although Gary Kleck argues that the highest-quality studies show that gun ownership does not increase homicide rates. [14]

  9. Cemented carbide - Wikipedia

    en.wikipedia.org/wiki/Cemented_carbide

    The coefficient of thermal expansion of cemented tungsten carbide is found to vary with the amount of cobalt used as a metal binder. For 5.9% cobalt samples, a coefficient of 4.4 μm/m·K was measured, whereas 13% cobalt samples have a coefficient of around 5.0 μm/m·K.

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