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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 ...
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 ...
The barrels have a 3 ⁄ 8 in dovetail, to which an accessory mount can be attached. Later Mark VII models were offered in .50 Action Express with a 7 ⁄ 8 in Weaver-pattern rail on the barrel; the .50 Mark VII later became the Mark XIX. Barrel lengths are 6, 10, and 14 inches [6] for .357 Magnum and .44 Magnum, but only 6 or 10 inches for .41 ...
While a simple slot milled in the barrel, such as those used in Magna-Porting, will provide some benefit, efficient redirection of the gas flow requires large ports and baffles to deflect as much gas as possible. It is also highly inadvisable to fire sabot rounds like shotgun slugs or APDS rounds through a muzzle brake not designed for them.
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 ...
Barrel nut: A firearm component used on barrels. On handguards, a barrel nut may refer to the component that holds the handguards to the barrel. On machine guns, a barrel nut is a screw on component at the rear of the barrel that has locking lugs and a notch for quick barrel change and helps install it in the trunnion.
A flip-up barrel and lack of extractor on a Beretta Bobcat semi-automatic pistol. Some very early blowback pistols used ammunition with no rim or extractor groove on the cartridge cases (e.g., 5mm Bergmann), and such pistols, therefore, lacked extractors. The spent case was forced out of the chamber by recoil and was subsequently ejected.
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