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  2. Harrington & Richardson - Wikipedia

    en.wikipedia.org/wiki/Harrington_&_Richardson

    Available in 20 gauge or .410 Bore/.45 Colt only. Available in either a blued finish or an electroless nickel finish with a polymer stock has a thumbhole/pistol-grip design. The right side of the stock is open with storage for three 20 gauge or four .410 bore shotgun shells. Topper shotgun (Single-shot). Available in gauges 12, 16, 20, and in ...

  3. Stock (firearms) - Wikipedia

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

    The anatomy of a gunstock on a Ruger 10/22 semi-automatic rifle with Fajen thumbhole silhouette stock. 1) butt, 2) forend, 3) comb, 4) heel, 5) toe, 6) grip, 7) thumbhole A gunstock or often simply stock, the back portion of which is also known as a shoulder stock, a buttstock, or simply a butt, is a part of a long gun that provides structural support, to which the barrel, action, and firing ...

  4. Loading gauge - Wikipedia

    en.wikipedia.org/wiki/Loading_gauge

    There is also a gauge for locomotives. The size of container that can be conveyed depends both upon the size of the load that can be conveyed and the design of the rolling stock. [18] W6A: Available over the majority of the British rail network. [19] W8: Allows standard 2.6 m (8 ft 6 in) high shipping containers to be carried on standard wagons ...

  5. Norinco NHM 91 - Wikipedia

    en.wikipedia.org/wiki/Norinco_NHM_91

    A civilian semi-auto variant of the Chinese Type 56 assault rifle, the NHM-91 was built to imitate the appearance of the Russian RPK light machine gun.First imported and marketed in the United States in 1991 by ChinaSports Inc., NHM-91's were modified to meet the requirements of a 1989 Executive Order by President George H. W. Bush prohibiting importation of certain 'assault rifle ...

  6. Heckler & Koch SR9 - Wikipedia

    en.wikipedia.org/wiki/Heckler_&_Koch_SR9

    The first SR9s imported had wood grain stocks. The SR9 was also referred to as the "Orion". Soon, H&K switched to black stocks. Right after the black stock guns were brought in, H&K also included a standard 91 stock set along with the SR9 thumbhole mounted stock set. HK SR9T Receiver.

  7. .318 Westley Richards - Wikipedia

    en.wikipedia.org/wiki/.318_Westley_Richards

    Westley Richards introduced the .318, primarily for use in their M98 Mauser and later their P14 Enfield based bolt action sporting rifles. The .318 Westley Richards is a rimless bottlenecked cartridge intended for big game hunting throughout the British Empire. The bullet diameter is actually .330", the naming is due to British nomenclature ...

  8. Scherrer equation - Wikipedia

    en.wikipedia.org/wiki/Scherrer_Equation

    The Scherrer equation, in X-ray diffraction and crystallography, is a formula that relates the size of sub-micrometre crystallites in a solid to the broadening of a peak in a diffraction pattern. It is often referred to, incorrectly, as a formula for particle size measurement or analysis. It is named after Paul Scherrer.

  9. Richards equation - Wikipedia

    en.wikipedia.org/wiki/Richards_equation

    The Richards equation represents the movement of water in unsaturated soils, and is attributed to Lorenzo A. Richards who published the equation in 1931. [1] It is a quasilinear partial differential equation ; its analytical solution is often limited to specific initial and boundary conditions. [ 2 ]