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The Anzio 20mm rifle [1] is an American anti-materiel rifle designed and marketed by Anzio Iron Works. It is the first American anti-materiel rifle designed and mass-produced for public sale with a bore diameter in excess of .50 caliber in over 80 years. [2]
In 1824, the Fort Pitt Foundry delivered 74 cast-iron 6-pounder guns out of an order of 100. [5] A second order of 100 cast-iron 6-pounders was delivered in 1828–1830 and at least 10 were rejected. Finally, 113 cast-iron 6-pounders were manufactured in 1836–1838 and 22 were rejected. No more orders were placed with the Fort Pitt Foundry.
1.7 Machine guns. 1.8 Artillery. 2 Defensive weapons. 3 References. 4 Bibliography. ... some 2,000 "Rains mines" had been built and deployed This page was last edited ...
He started with a hollow tube or solid bar of wrought iron and wrapped it with sheets of iron until the pile was the diameter of the gun's bore. [5] Sheets of iron were wrapped around the pile and forged and welded to the pile. The finished gun block was then bored out, removing almost all of the original pile.
To further ensure that the gun cooled from the inside out, a fire was built around the iron flask containing the gun mold, keeping the gun mold nearly red-hot. For an 8-inch Rodman columbiad , the core was removed 25 hours after casting and the flow of water continued through the space left by the core for another 40 hours.
The M134 Minigun is an American 7.62×51mm NATO six-barrel rotary machine gun with a high rate of fire (2,000 to 6,000 rounds per minute). [2] It features a Gatling-style rotating barrel assembly with an external power source, normally an electric motor.
In one lot of 86 cast iron guns, 21 burst at the first fire during testing. Consequently, the Ordnance Board of 1831 under Alexander Macomb specified that field artillery pieces should be manufactured from bronze. The 1834 regulations required that field guns be made in 6-, 9-, and 12-pounder calibers and howitzers in 12- and 24-pounder calibers.
For naval mines, the Huolongjing describes the use of slowly burning joss sticks that were disguised and timed to explode against enemy ships nearby: The sea-mine called the 'submarine dragon-king' is made of wrought iron, and carried on a (submerged) wooden board, [appropriately weighted with stones]. The (mine) is enclosed in an ox-bladder.