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The X-BOLT rifle is a bolt-action rifle. Its name comes from the "X-Lock" scope mounting system. In addition, it uses the "X-BOLT Feather Trigger" which features an adjustable trigger pull.
If the barrel, receiver and bolt are not fitted properly, severe and potential fatal problems can arise due to faulty headspace, e.g. cartridge overpressure and case rupture. Threaded barrels are often mounted to the receiver with a lot of torque, and will therefore generally require tools for assembly and disassembly, such as a suitable action ...
While modern firearms are generally referred to by the name of the cartridge the gun is chambered for, they are still categorized together based on bore diameter. [citation needed] For example, a firearm might be described as a "30 caliber rifle", which could accommodate any of a wide range of cartridges using a roughly 0.30 inches (7.6 mm) projectile; or as a "22 rimfire", referring to any ...
The term caliber change in firearms refers to the process of permanently altering a firearm to allow it to fire a different cartridge than the one it previously fired. With a bolt action rifle, this is mostly done by reshaping the current chamber through machining it with a new reamer, or by replacing the barrel with a new barrel, which has a new cartridge chamber machined into it.
A rifle is a firearm designed to be fired from the shoulder, with a barrel that has a helical groove or pattern of grooves ("rifling") cut into the barrel walls.The raised areas of the rifling are called "lands," which make contact with the projectile (for small arms usage, called a bullet), imparting spin around an axis corresponding to the orientation of the weapon.
The original Ball bullets made in 1942 had Gilding-Metal-clad jackets and the later Alternate Ball versions made from 1943 to 1944 had Gilding-Metal-Coated-Steel (GMCS) jackets. The Chinese numbers 七 ( Qi , or "7") over 九 ( Jiǔ , or "9") at the 9 o'clock position represent the bullet's caliber (7.9mm).