Search results
Results from the WOW.Com Content Network
In the classic division a choice can be made between up to a 10-shot capacity 1911 with minor scoring (e.g. 9×19mm) or up to an eight-shot capacity 1911 with major scoring (e.g. .40 S&W or .45 ACP). In the revolver division major scoring can be achieved with a 9 mm bullet diameter, but with a power factor of 170.
This 12 gauge smoothbore shotgun has a 14-inch (36 cm) barrel and a rust-resistant parkerized finish. It is also available with 12.5-inch [1] (31.75 cm) and 18-inch barrel [2] (45.72 cm) variants.
The length of the round is 65mm and the whole round weighs 44 grams. The muzzle velocity is reported at 420 m/s (1380 fps), with an effective range of up to 100 meters. Due to the DBD-09 round generating high-impulse recoil, the QBS09 shotgun is equipped with a spring-buffered shoulder stock, which retracts every time the gun fires.
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 ...
For firearms having a rifled barrel, the bullet typically extends forward from the leading edge of the cartridge case. The portion of the barrel forward of the chamber that provides clearance for the loaded bullet of a cartridge is known as the throat. The throat is composed of both a freebore and a leade. [6]
The standard AP-9 has a 5-inch barrel. The AP-9 Target began with a 12-inch barrel (Target AP-9), but this was later reduced to 11 inches (AP-9/11 Target); they both have a separate fore-end and a fluted barrel. These firearms were banned by most states after the passage of the Federal Assault Weapons Ban. [2] [3]
From a thermodynamic point of view, a firearm is a special type of piston engine, or in general heat engine where the bullet has a function of a piston. The energy conversion efficiency of a firearm strongly depends on its construction, especially on its caliber and barrel length.
For handgun cartridges, with heavy bullets and light powder charges (a 9×19mm, for example, might use 5 grains (320 mg) of powder, and a 115 grains (7.5 g) bullet), the powder recoil is not a significant force; for a rifle cartridge (a .22-250 Remington, using 40 grains (2.6 g) of powder and a 40 grains (2.6 g) bullet), the powder can be the ...