File:Report of the Board of officers appointed in pursuance of the act of Congress approved June 6, 1872, for the purpose of selecting a breech-system for the muskets and carbines of the military service, (14596686028).jpg

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English: Muir-Montstorm musket, caliber .58 disassembled

Identifier: reportofboardof00unit (find matches)
Title: Report of the Board of officers appointed in pursuance of the act of Congress approved June 6, 1872, for the purpose of selecting a breech-system for the muskets and carbines of the military service, together with their report upon the subject of trowel-bayonets;
Year: 1873 (1870s)
Authors: United States. Board on Breech-loading Small-arms United States. Army. Ordnance Dept
Subjects: United States. Army Firearms Bayonets
Publisher: Washington, Govt. Print. Off.
Contributing Library: Library of the Marine Corps
Digitizing Sponsor: Library of the Marine Corps

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frame overhanging the mouth of the chamber. By continu-ing the motion of the lever, the breech is fully exposed by the rotationof the block, the hammer at the same time being brought to the full-cock. Closed.—By reversing the movement of the lever the breech is closed. Locked.—The breech-block is locked by the abutment of the frameupon its back. The back is partly flattened near the lower corner. Thisflat surface coming in contact with the frame, as the block is raised toengage with the hook or jaw above referred to, prevents the rotation ofthe block until it is depressed by the regular motion of opening. Fired.—The lock is essentially of the usual form of center-locks. Extraction and ejection.—By a.sliding extractor in the lower side ofthe barrel. Its under side is notched for the upper end of a lever,which is pivoted on the same pin as the hammer. This lever has twohorizontal arms, which are struck by corresponding prongs on the lowerside of the block, in opening the piece.
Text Appearing After Image:
il ,:, 39 PARTS PECULIAIl AND ESSENTIAL TO THE SYSTEM. Two of Wood: 3 Tip Stock,7 Butt Stock. Thirteen principal metallicparts not otherwise mentioned: 1930212630 31343537 Frame, Side Plate, Right Side Plate, Left Guard Plate, Breech Ploek, Firing Pin, Cam Shaft, Lever, Hammer, Extractor, Extractor Lever, 41 Trigger, 47 Main Spring Swivel. Sixteen Screws: 4 Tip Stock Screw, 22 Side Plate Screw, 23 Side Plate Screw, 24 Side Plate Serew, 25 Side Plate Serew,27 Guard Plate Screw,38 Guard Plate Serew,29 Tang Screw, 32 Firing Pin Nut, in Extractor Lever Screw, 13 Trigger Spring Screw, 44 Trigger Screw, 4 Main Spring Screw, Main Spring Swivel Scr.,Main Spring Swivel Scr.,Spring Lever Catch Scr. Two Pins:Barrel Pin,Lever Pin. Four Springs:Firing Pin Spring,Trigger Spring,Main Spring,Spring Lever Catch.Two other minor parts:JO Side Plate, Right Dowel Pin,.1 Side Plate, Left DowelPin. 14 PARTS NOT PECULIAR TO THE SYSTEM, OR COMMON TO ALL ARMS. Parrel and Front Sight,Tip, Tip Screw,Putt

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30 July 2014



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