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Barrels with an integral muzzle brake are often said to be ported. The concept of a muzzle brake was first introduced for artillery. It was a common feature on many anti-tank guns , especially those mounted on tanks , in order to reduce the area needed to take up the strokes of recoil and kickback.
Illustration of forces in muzzle rise. Projectile and propellant gases act on barrel along barrel centerline A. Forces are resisted by shooter contact with gun at grips and stock B. Height difference between barrel centerline and average point of contact is height C. Forces A and B operating over moment arm / height C create torque or moment D, which rotates the firearm's muzzle up as ...
The FN TPS (Tactical Police Shotgun) is a pump-action shotgun designed and manufactured by FN Herstal. It is based on the Winchester Model 1300 and uses many similar features such as the ported barrel. [2] It also has many modern features, including an adjustable or A2 fixed stock, pistol grip, adjustable sights, and MIL-STD-1913 Picatinny rail ...
As far back as 1787 a Frenchman by the name of M. Magne de Marolles gave an account of choke-boring, though he argued against it. [3]Some sources state that the first pioneer was a Czech named Dominik Brandejs, who made shotguns with a choke in order to reduce the dispersion of shots, but his design was not popular in the 1820s.
The Contender can fire .410 bore shotgun shells, either through the .45 Colt/.410 barrel or through a special 21-inch (530 mm) smoothbore shotgun barrel. A ported, rifled, .44 Magnum barrel was made available for use with shotshell cartridges in a removable-choke .44 Magnum barrel, with the choke being used to unspin the shot from the barrel ...
United States President Barack Obama firing a Browning Citori 525 on the range at Camp David. [4] The side jet of smoke is from the ported barrel.. Browning Citoris come in all of the popular shotgun shell gauges, and are made in an over-under "stacked" barrel configuration, with forends and buttstocks made from high quality walnut wood.
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Conversions for rifles and carbines of larger caliber, such as the AK-47 or Thompson submachine gun include a rifled insert barrel extending beyond the length of the chamber. [ 9 ] [ 10 ] One exception to the use of a special lightweight bolt was the Colt Service Ace , offered as a complete pistol or as a conversion kit for the M1911.