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The M30 was a combination gun of common drilling type with two shotgun barrels over a rifle barrel, which became popular with European hunters in the early 20th century. Drillings had existed earlier, but prior to the introduction of affordable and reliable cast steel gun barrels in the late 19th century they were either prohibitively expensive ...
Truck-mounted core drill. A modern core drill is a drill specifically designed to remove a cylinder of material, much like a hole saw. The material left inside the drill bit is referred to as the core. Core drills used in metal are called annular cutters. Core drills used for concrete and hard rock generally use industrial diamond grit as the ...
The first commercial production of a coin shooting pistol was by MacGlashan Air Machine Gun Company. MacGlashan was better known for the air-powered machine guns that fired steel BB's used by the Army Air Corp , and the US Navy as an aerial gunnery trainer .
By design, fully jacketed projectiles have less capacity to expand after contact with the target than a hollow-point projectile or a soft-point projectile.While this can be an advantage when engaging targets behind cover, it can also be a disadvantage as an FMJ bullet may pierce completely through a target, leading to less severe wounding, and possibly failing to disable the target.
Rock core samples, the product of a diamond rig. A pied butcherbird perches nearby. A core sample is a cylindrical section of (usually) a naturally-occurring substance. Most core samples are obtained by drilling with special drills into the substance, such as sediment or rock, with a hollow steel tube, called a core drill. The hole made for the ...
A picture showing typical combination gun (top), drilling (middle), and vierling (bottom) barrel layouts. A combination gun is a firearm that usually comprises at least one rifled barrel and one smoothbore barrel, that is typically used with shot or some type of shotgun slug. Most have been break-action guns, although there have been other ...
The 8×63mm patron m/32 was a bottlenecked centrefire cartridge with a slightly (0.25 mm (0.0098 in)) rebated rim for Swedish heavy and medium machine guns. It was used from 1932 to the finalisation of the re-chambering process of these machine guns to 7.62×51mm NATO in 1975.
P.m.K. - Phosphor mit Kern ("phosphorus with steel core") machine gun ammunition loaded with the 10.15 grams (156.6 gr) P.m.K. bullets that had a muzzle velocity of 830 m/s (2,723 ft/s) and an operating pressure of 280 MPa (40,611 psi). This cartridge can be recognised by the black primer sealant and yellow tipped bullet.