how a bullet works

There were so long i think about how a bullet shot? but, after i seen this picture i know how it shot. First, the hammer hit the Primer ,than it produce heat and heat the Propellant ,than the Propellant explode in the Bullet Case,than inside the Bullet Case produce pressure and push the bullet out from the Bullet Case.

the 50.cal

The M107 provides a man-portable, materiel destruction capability to the sniper team and/or supported force and complements the anti-personnel precision fire capability of the M24 Sniper Weapon System (SWS). The M107, with a family of ammunition, enables sniper teams to employ greater destructive force at greater ranges and at a higher rate of fire that exceed the terminal effect capability of the M24 (7.62mm, bolt action) SWS.

The primary mission of this rifle is to engage and defeat materiel targets at extended ranges to include parked aircraft; command, control, communications, computers, and intelligence (C4I) sites; radar sites; ammunition; petroleum, oil and lubricants; and various other thin skinned (lightly armored) materiel targets out to 2000 meters.

The M107 will also be used in a counter sniper role taking advantage of the longer stand off range and increased terminal effect when opposing snipers armed with smaller caliber weapons out to 1000 meters.

The M107 is a semi-automatic, air-cooled, box magazine-fed rifle chambered for .50 caliber ammunition. This rifle operates by means of the short recoil principle, rather than gas.

The basic M107 rifle is equipped with bipod, muzzle brake, carrying handle, and 10-round removable magazine. The M107 system is composed of the rifle and a sniper scope, plus six spare magazines. The rifle is also supplied with a fitted dirt-tight and watertight carrying case, the requisite cleaning kit drag bag, cleaning equipment, and the telescope adjustment tools.

The M107 will replace existing non-standard, M82A1, caliber .50 rifles in Explosive Ordnance Detachments as detonation tools.


(from :http://www.inetres.com/gp/military/infantry/rifle/M107.html)

my knowlage about sniper

The term sniper was first attested in 1824 in the sense of the word "sharpshooter".^[2] The verb "to snipe" originated in the 1770s among soldiers in British India where a hunter skilled enough to kill the elusive snipe was dubbed a "sniper".^[2] One notable early victim was Robert Greville, 2nd Baron Brooke, killed in 1643 by a sniper hiding in Lichfield Cathedral.

During the American Civil War, the common term used in the United States was "skirmisher". Throughout history armies have used skirmishers to break up enemy formations and to thwart the enemy from flanking the main body of their attack force.^[3] They were deployed individually on the extremes of the moving army primarily to scout for the possibility of an enemy ambush. Consequently, a "skirmish" denotes a clash of small scope between these forces.^[4] In general, a skirmish was a limited combat, involving troops other than those of the main body.^[3] The term "sniper" was not in widespread use in the United States until after the American Civil War.

The term "sniper" has been used in more serious tones especially by media in association with police precision riflemen, those responsible for assassination, any shooting from all but the shortest range in war, and any criminal equipped with a rifle in a civil context. This has rather expanded the meaning of the term. It has also given the term "sniper" mixed connotations. Official sources often use more positive connotative terms to describe snipers, especially for police snipers: "counter-sniper", "precision marksman", "tactical marksman", "sharpshooter", "precision riflemen", and "precision shooter". Some of these alternatives have been in common use for a long time; others are closer to undisguised euphemisms

(from wikipedia: http://en.wikipedia.org/wiki/Sniper)