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The M16 rifle (officially designated Rifle, Caliber 5.56 mm, M16) is a family of assault rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-round magazine.
The La France M16K was basically a standard military M16 rifle chambered for the 5.56 mm cartridge, but modified with an 8 + 3 ⁄ 8 inches (210 mm) barrel. Like many automatic and semi-automatic weapons the M16 utilizes pressure from the propellant gases in the barrel to cycle the bolt of the firearm.
Eugene Morrison Stoner (November 22, 1922 – April 24, 1997) was an American machinist and firearms designer who is most associated with the development of the ArmaLite AR-15 rifle that was redesigned and modified by Colt's Patent Firearm Company for the United States military as the M16 rifle.
However, the M16 rifle's reputation continues to suffer. [251] After the introduction of the M4 Carbine, it was found that the shorter barrel length of 14.5 inches also harm reliability, as the gas port is located closer to the chamber than the gas port of the standard length M16 rifle: 7.5 inches instead of 13 inches. [252]
The rifle was conceived out of want of an M16-like rifle in .22 caliber. This is a reasonably accurate semi-automatic rifle for plinking . As compared to the AR-15-style rifles , chambered in 5,56x45mm cartridge, the M1600 has less recoil, as it is chambered in the weaker .22LR (LR standing for long rifle) making it easier to handle.
An early XM8 mockup after the break up; became part of OICW Increment 1. The Objective Individual Combat Weapon or OICW was the next-generation service rifle competition that was under development as part of the United States Army OICW program; the program was eventually discontinued without bringing the weapon out of the prototype phase.
The Squad Designated Marksman Rifle (SDM-R [1]) is an American designated marksman rifle used by the United States Army. It is essentially a heavily modified M16 rifle designed to provide U.S. Army designated marksmen greater accuracy and firepower at longer ranges, increasing an infantry squad 's effective range to up to 600 meters.
The SEAL Recon Rifle (nicknamed the "Sniper M4" [2] and "Recce" [3]) is an American designated marksman rifle and assault rifle used by the United States Navy SEALs.Essentially a heavily modified M16 rifle, it is intended to provide SEAL snipers and designated marksmen with a versatile, accurate, lightweight, and relatively compact weapon chambered in 5.56×45mm NATO.