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It was originally named the MMJ 5.7mm [1] by its designer and is also known in the U.S. as the 5.7mm Johnson, the Johnson MMJ 5.7mm Spitfire, and the .22 Johnson, (or 5.7×33mm internationally). In 1963, Melvin M. Johnson developed a conversion of the M1 Carbine (by either relining or re-barreling the M1 Carbine ) to a .224 caliber bore, using ...
1927 Johnson Seahorse outboard motor at the Tellus Science Museum. The original company that made Johnson inboard motors and outboard motors was the Johnson Brothers Motor Company of Terre Haute, Indiana, United States. They started building inboard 2-cycle marine engines in 1903 in a barn behind the house, along with matching boats.
Gunsmithing at Home: Lock, Stock & Barrel - Page 79, John E. Traister · 1996 Gunsmithing Modern Firearms: A Gun Guy's Guide to Making Good Guns Even Better, Bryce M. Towsley · 2019 Gunsmithing - Page 176, Roy F. Dunlap · 1963
Each brand of ammunition in each caliber/cartridge was tested at 18". Then, the barrel was removed and 1" was cut off the end of the barrel and the cut end was dressed. Once all the cartridges had been tested at 18" and the barrels were cut and ready, each brand was tested again at 17" and so on, right down to a 2" barrel.
Before the barrel can release the bullet in a consistent manner, it must grip the bullet in a consistent manner. The part of the barrel between where the bullet exits the cartridge, and engages the rifling, is called the "throat", and the length of the throat is the freebore. In some firearms, the freebore is zero as the act of chambering the ...
Attaching the barrel to the receiver using a barrel nut and a barrel with a shoulder is an alternative to action threads, which has been used in firearms such as the Sten gun and AR-15. Hand tools Quick barrel change systems is an increasingly popular alternative, as seen in for example SIG Sauer 200 STR , Roessler Titan or Blaser R8 .
In the early 1980s, High Standard Firearms had been dealing with financial problems and had to cease derringer production in 1984. Benjamin Johnson Technologies scaled up the design, into a .38 Special pocket gun known as the DA38 Derringer. In 1990, the design went to the American Derringer Company. [2] [3]
The Triple Crown shotguns are triple-barrel, break-action shotguns, chambered in 12-, 20-, 28-gauge, and .410 bore. [1] [2] The 12-, 20-gauge, and .410 bore models will accept 3-inch magnum shells and the 28-gauge model will accept 2-3/4-inch shells. The 12-gauge model has 28-inch barrels, while all of the other models have 26-inch barrels. [3]