The US military currently owns many of the most powerful rifles in the world, some of which are from the Cold War era but have been upgraded and modified to suit the 21st century. .
M4A1
In any conversation related to US military rifles, it is impossible not to mention the M4 – a more compact version of the legendary M16 rifle. 
The M4A1 rifle. Photo: US Army Although the M4 and M16 are quite similar in appearance, overall, the M4 is still lighter and shorter, with a weight of 2.88kg and a length of 83.82cm (including the stock). This design is intended to maximize the advantage of the M4 when used in situations where compact, easy-to-carry weapons are required, such as urban combat, for cavalry or in battle. cramped armored vehicles. Like the M16, the M4 uses standard 5.56 x 45 mm NATO ammunition. However, because the barrel is 37 cm long, shorter than the M16, the effective range is slightly lower. The M4 assault rifle has the longest range of 600m, a maximum rate of fire of 950 rounds/minute with a warhead velocity of 884m/s. M4 is quite popular in the world. It is widely used in Latin America, the Middle East, Europe and some other regions. FNSCAR The SCAR series of rifles was born in response to the request of the US Special Operations Command for a rifle designed in a modular form (allowing for quick configuration changes, compatible with other types of equipment). supported), uses a standard 5.56 x 45 mm and 7.62 x 51 mm magazine. 
FNSCAR rifle. Photo: US Army The gun can be assembled to convert into a light version CAR-L and a heavy version SCAR-H. Both models can be used as marksman rifles or melee weapons because they have 3 different barrel types: short, standard and long. Despite their similar appearance, the SCAR-L uses the standard NATO STANAG magazine while the SCAR-H uses a magazine designed by the Belgian company FN Herstal. Assault Rifle M27 The Marine Corps’ new M27 assault rifle is considered one of the most accurate rifles in the US military’s arsenal. 
M27 rifle. Photo: US Marines The M27 is the designation of the automatic rifle line developed from the German-designed Heckler & Koch 416 prototype, put into service by the US Marines since 2011. The Heckler & Koch 416 was used to destroy bosses. Osama bin Laden during the famous US Navy SEAL raid in Abbottabad, Pakistan. The M27 has significantly improved accuracy, range and reliability over the M16 and M14, thanks to a free-oscillating barrel with a length of about 420 mm and a short-stroke gas piston system. This gun uses NATO standard ammunition size of 5.56x45mm, has a rate of fire from 700 to 900 rounds per minute. Currently, the Marines are considering upgrading the M27’s lethality. Video: US Marines practice firing live ammunition with M27 rifles. Source: AirSource.com Rifle M14 The M14 rifle, produced since 1959, is 1,181 mm long, has a rate of fire of 725 rounds per minute and a range of 460 m, with a wooden stock. It is quite solid, has high accuracy as well as great destructive power thanks to the use of NATO standard 7.62 x 51 mm magazine. 
Rifle M14. Photo: US Navy The M-14 was the main weapon used by the US infantry in the early stages of the Vietnam War. Although a good rifle, it was not suitable for the Vietnam battlefield because it was too heavy, too long, and the wooden parts were prone to warping due to the humid climate. Finally, the US military upgraded and improved this gun to create a new version, the Mk14 rifle. Rifle Mk 14 EBR The Army and US Special Operations Command redesigned the M14 rifle, creating the Mk 14 Enhanced Battle Rifle (EBR). Compared to the M14, the Mk 14 EBR has the same firing mechanism but different materials. 
The MK14 EMR rifle. Photo: US Department of Defense The Mk 14 features an all-metal, composite and alloy design, an adjustable stock grip, and an easily retractable gun mount. It also has a Picatinny rail for attaching more modern accessories and scopes. Although the gun is heavier than the M14, it has more stability and durability. M39 EMR The US Marines had similar ideas as the Army, but they decided to modify the M14 slightly, which led to the introduction of the M39 EMR rifle. 
The M39 EMR rifle. Photo: US Marines The M39 EMR also features a custom stock, collapsible gun mount, and accessory rails. However, this version was quickly replaced by more modern marksman rifles.
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