This breech-loading arm has a fixed chamber closed by a movable breech-block, which rotates about a horizontal axis at 90 degrees to the axis of the barrel, and lying above the axis of the barrel and in rearóbeing moved from below. This arm is provided with a falling breech-block, moved by a sliding trigger-guard, the withdrawal of which retracts the firing-pin, brings the hammer to the half-cock, and drops the block, which strikes in its descent and operates the usual bent-lever extractor. By pushing the trigger-guard forward again the block is raised, when by bringing the hammer to the full-cock, the piece is closed and ready to be fired. The blow of the hammer is not delivered directly upon the firing-pin, but on an intermediate lever pivoted below its point of impact on the firing-pin, and striking it so as to impel it forward in the line of the axis of the bore. This gun has been modified by substituting for the sliding-guard the more powerful motor found in the usual swinging guard-lever, the angle formed by which with the stock when the piece is opened being about 30 degrees.
Farrow, Edward S. American Small Arms; a Veritable Encyclopedia of Knowledge for Sportsmen and Military Men. New York: Bradford, 1904. Print.
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