Accuracy International Arctic Warfare - Design Details - Barrel


The free-floating, heavy, stainless steel barrels (stainless steel barrels resist throat erosion better than normal barrels) for the available cartridge chamberings all have a different length, groove cutting and rifling twist rate optimized for their respective chambering and intended ammunition. For the .243 Winchester chambering barrels the twist rate is 254 mm (1 in 10 in) and for .308 Winchester/7.62x51mm NATO chambering barrel variants the twist rate is 305 mm (1 in 12 in) excepted for the suppressed barrel variant. If the consistent accuracy requirement of an operator is no longer met the barrel can fairly easily be renewed. This is normal practice for active high performance precision rifle operators, who regard barrels as expendable items. The barrels are provided by the Australian Madco Arms (button rifled), and the Scottisch company Border Barrels, who cut-rifles them on genuine Pratt & Whitney rifling benches. Twists are one turn in 10,11,12,13 and 14 inches for 7.62 MM depending on RFP.

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Famous quotes containing the word barrel:

    When you got to the table you couldn’t go right to eating, but you had to wait for the widow to tuck down her head and grumble a little over the victuals, though there warn’t really anything the matter with them. That is, nothing only everything was cooked by itself. In a barrel of odds and ends it is different; things get mixed up, and the juice kind of swaps around, and the things go better.
    Mark Twain [Samuel Langhorne Clemens] (1835–1910)

    My long two-pointed ladder’s sticking through a tree
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    Robert Frost (1874–1963)

    Peaches grow wild, and pigs can live in clover;
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    The spring begins before the winter’s over.
    Elinor Wylie (1885–1928)