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  2. Semi-automatic firearm - Wikipedia

    en.wikipedia.org/wiki/Semi-automatic_firearm

    This is a locked-breech, long recoil action designed by John Browning. The rifle was offered in .25, .30, .32, and .35 caliber models, and gained popularity among civilians as well as some law enforcement officials who appreciated the combination of a semi-automatic action and relatively powerful rifle cartridges.

  3. Long range shooting - Wikipedia

    en.wikipedia.org/wiki/Long_range_shooting

    View through a 20x power scope sight with mil-dots at 300 yards (274 meters). The ideal scope sight magnification for different types of long range shooting depends on application, scope quality and user preference. Different applications may have different shooting distances, light conditions, target sizes and target contrast against the ...

  4. List of AR platform cartridges - Wikipedia

    en.wikipedia.org/wiki/List_of_AR_platform_cartridges

    The AR-15 rifle usually comes chambered for either the military cartridge 5.56×45mm or the .223 Remington. Because of the pressures associated with the 5.56×45mm, it is not advisable to fire 5.56×45mm rounds in an AR-15 marked as .223 Remington, since this can result in damage to the rifle or injury to the shooter. [1]

  5. Longest recorded sniper kills - Wikipedia

    en.wikipedia.org/wiki/Longest_recorded_sniper_kills

    This list is not exhaustive, as such data is generally not tracked nor managed under any official procedure. For example, the 2002 Canadian Army sniper team that saw two soldiers set consecutive new records (Arron Perry at 2,310 m (2,526 yd) and Rob Furlong at 2,430 m (2,657 yd)), also made a number of kills at 1,500 m (1,600 yd) that are not counted here. [23]

  6. What do you know about the AR-15 rifle? Here are five facts ...

    www.aol.com/news/know-ar-15-rifle-five-170837426...

    According to the National Shooting Sports Foundation, there were 20 million AR-15 style weapons as of 2020. From 1990 to 2020, the U.S. imported or manufactured over 24.4 million. In 2020 alone ...

  7. ArmaLite AR-15 - Wikipedia

    en.wikipedia.org/wiki/Armalite_AR-15

    The ArmaLite AR-15 internal piston action was derived from the original ArmaLite AR-10 action and was later used in the M16 rifle action. This internal piston action system designed by Eugene Stoner is commonly called a direct impingement system, but it does not utilize a conventional direct impingement system.

  8. AR-15–style rifle - Wikipedia

    en.wikipedia.org/wiki/AR-15–style_rifle

    Rifles styled like the AR-15 come in many sizes and have many options, depending on the manufacturer. The lower receiver, without the receiver extension, rear takedown pin, and buttstock, is shown at bottom. An AR-15–style rifle is a lightweight semi-automatic rifle based on or similar to the Colt AR-15 design.

  9. What can an AR-15 do to the human body? A trauma surgeon ...

    www.aol.com/news/ar-15-human-body-trauma...

    Children are less likely to survive AR-15 wounds. The leading cause of death in children between the ages of 1 and 19 in the U.S. is gun violence, according to a recent New England Journal of ...