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2. 4.7-inch/50-caliber Mark 3 gun - Wikipedia

   en.wikipedia.org/wiki/4.7-inch/50-caliber_Mark_3_gun

   They were based on the British 4.7-inch Gun Mark IV, but a non-standard export model, the standard Mark IV was 40 caliber. They were constructed of a tube with a jacket and four hoops that went from the breech to the muzzle. [1] In 1903 the eight guns from New Orleans and Albany were removed and replaced with 5-inch (127 mm)/50 caliber guns

3. Obturation - Wikipedia

   en.wikipedia.org/wiki/Obturation

   Obturation in firearms and air guns is the result of a bullet or pellet expanding or upsetting to fit the bore, or, in the case of a firearm, of a brass case expanding to seal against the chamber at the moment of firing. In the first case, this both seals the bullet in the bore, and causes the bullet to engage the barrel's rifling. In the ...

4. Cartridge (firearms) - Wikipedia

   en.wikipedia.org/wiki/Cartridge_(firearms)

   For example, the .50-90 Sharps has a .50-inch bore and used a nominal charge of 90.0 grains (5.83 g) of black powder. Many such cartridges were designated by a three-number system (e.g., 45–120–3 1 ⁄ 4 Sharps: 45-caliber bore, 120 grains of (black) powder, 3 1 ⁄ 4-inch long case). Other times, a similar three-number system indicated ...

5. Barrett M82 - Wikipedia

   en.wikipedia.org/wiki/Barrett_M82

   In summer 2002, the M82 finally emerged from its Army trial phase and was officially adopted as the Long Range Sniper Rifle, Caliber .50, M107. The M107 uses a Leupold 4.5–14×50 Mark 4 scope. [5] The Barrett M107 is a .50 caliber, shoulder-fired, semi-automatic sniper rifle.

6. .416 Barrett - Wikipedia

   en.wikipedia.org/wiki/.416_Barrett

   The cartridge was designed as an improvement to the .50 BMG cartridge, a common machine gun and rifle cartridge. It is a wildcatted .50 BMG case, shortened to 3.27 inches (83 mm) from its original length of 3.91 inches (99 mm) and necked down to accept a .416 caliber , 398-grain (25.8 g) projectile; [ 3 ] [ 4 ] however, the case dimensions are ...

7. 3-inch/50-caliber gun - Wikipedia

   en.wikipedia.org/wiki/3-inch/50-caliber_gun

   The 3-inch/50-caliber gun (Mark 22) was a semiautomatic anti-aircraft weapon with a power-driven automatic loader and was fitted as single and twin mounts. The single mount was to be exchanged for a twin 40 mm antiaircraft gun mount, and the twin 3-inch/50 for a quadruple 40 mm mount, on Essex -class aircraft carriers , and Allen M. Sumner and ...

8. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. M2 Browning - Wikipedia

   en.wikipedia.org/wiki/M2_Browning

   The M2 machine gun or Browning .50 caliber machine gun (informally, "Ma Deuce") [13] [14] is a heavy machine gun that was designed near the end of World War I by John Browning. While similar to Browning's M1919 Browning machine gun , which was chambered for the .30-06 cartridge, the M2 uses Browning's larger and more powerful .50 BMG (12.7 mm ...