ব্যবহারকারী:Aaa24294/খেলাঘর

উইকিপিডিয়া, মুক্ত বিশ্বকোষ থেকে
পরিভ্রমণে ঝাঁপ দিন অনুসন্ধানে ঝাঁপ দিন
A Dreyse Needle Rifle

A Henry Rifle

A M1 Garand rifle An AK-47 caption=M16 variants

A Steyr AUG
আধুনিক রাইফেলের ক্রমবিকাশ
প্রথম: বাকার রাইফেল, ১৯শ শতাব্দীর প্রথম দিককার ফ্লিন্টলক রাইফেল .
দ্বিতীয়: প্যাটার্ন ১৮৫৩ এনফিল্ড, ১৯শ শতাব্দীর মাঝামাঝি সময়ের ক্যাপলক রাইফেল্ড মাস্কেট.
তৃতীয়: ড্রেইজ নিডল গান, প্রথম আদর্শ সামরিক ব্রিচলোডিং রাইফেল.
চতুর্থ: হেনরি রাইফেল, প্রথম সফল লিভার একশন রিপিটিং রাইফেল.
পংচ: Lebel Model 1886 rifle, a late 19th-century bolt-action rifle and the first to use smokeless powder.
Sixth: M1 Garand, an early 20th-century semi-automatic rifle and the first to be adopted as standard military issue.
Seventh: АК-47, a mid 20th-century gas-operated, magazine-fed automatic rifle.
Eighth: M-16 rifle variants A1, A2, M4 Carbine and A4, a late 20th-century gas-operated, magazine-fed assault rifle.
Ninth: Steyr AUG, a late 20th-century selective fire, bullpup assault rifle.

A rifle is a portable, long-barrelled firearm designed for accurate long-range shooting, to be held with both hands and braced against the shoulder for stability during firing, and with a barrel that has a helical pattern of grooves ("rifling") cut into the bore wall. The term was originally rifled gun, with the word "rifle" referring to the machining process of creating groovings with cutting tools, and is now used for any long handheld device designed for well-aimed discharge activated by a trigger, such as the personnel halting and stimulation response rifle. Rifles are used extensively in warfare, law enforcement, hunting and shooting sports.

Like all typical firearms, a rifle's projectile (bullet) is propelled by the contained deflagration of a combustible propellant compound (originally black powder, later cordite, and now nitrocellulose), although other means such as compressed air are used in air rifles, which are popular for vermin control, hunting small game, formal target shooting and casual shooting ("plinking"). The raised areas of a barrel's rifling are called "lands", which make contact with and exert torque on the projectile, imparting a spin around the longitudinal axis of the barrel. When the projectile leaves the barrel, this spin lends gyroscopic stability to the projectile and prevents tumbling in flight, in the same way that a spirally thrown American football or rugby ball behaves. This allows the use of aerodynamically-efficient bullets (as opposed to the spherical balls used in muskets) and thus improves range and accuracy.