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The M240 machine gun, officially the Machine Gun, 7.62 mm, M240, is the U.S. military designation for the FN MAG, [6] a family of belt-fed, gas-operated medium machine guns that chamber the 7.62×51mm NATO cartridge. [1] The M240 has been used by the United States Armed Forces since the late 1970s.
For example, the US Army and Marines now use the FN MAG (as the M240 machine gun), which is generally called the "M240 medium machine gun". It was originally adopted for vehicle mounting in the late 1970s, but its higher reliability resulted in the infantry adopting it for use over the M60 machine gun , despite it being several pounds heavier.
The move to s [1] teel shot reduced the use of 16 and 20 gauges for waterfowl hunting, and the shorter, 2 + 3 ⁄ 4-inch (70 mm), 12-gauge shells as well. However, the 3 + 1 ⁄ 2-inch (89 mm) 12-gauge shell, with its higher SAAMI pressure rating of 14,000 psi (97 MPa) compared to standard 2 + 3 ⁄ 4-inch (70 mm) and 3-inch (76 mm) 12-gauge ...
M2HB – heavy machine gun chambered in .50 BMG used primarily on vehicles. M240B – 7.62×51mm medium machine gun used by infantry, and light vehicles and helicopters. Mk48 Mod 1 – 7.62×51mm light machine gun, used by US MARSOC. M249E4 – 5.56×45mm light machine gun, infantry support weapon.
XM250 with the XM157 fire-control system A non-commissioned officer from Fort Campbell fires an XM250.. The XM250 is the U.S. military designation for the SIG LMG 6.8, a 6.8×51mm (.277 in), gas-operated, belt-fed light machine gun designed by SIG Sauer for the U.S. Army's Next Generation Squad Weapon Program in 2022 to replace the M249 light machine gun.
Military use of combat shotguns through the 20th century has created a need for ammunition maximizing the combat effectiveness of such weapons within the limitations of international law. 12-gauge has been widely accepted as an appropriate bore diameter to provide an effective number of projectiles within an acceptable recoil. Early 12-gauge ...
It is renowned for its large caliber, firing a 23 mm shotgun shell, equating to 6.278 gauge using the British and American standards of shotgun gauges and approximately 4 gauge using the current European standards (based on the metric CIP tables), making it the largest-bore shotgun in modern use.
The 20-gauge shotgun, also known as 20 bore, is a type of smoothbore shotgun. 20-gauge shotguns have a bore diameter of .615 in (15.6 mm), while the 12-gauge has a bore diameter of .729 in (18.5 mm). [ 2 ] 12-gauge and 20-gauge shotguns are the most popular gauges in the United States .