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.

(Photo: Internet) The exact name of this scary pass is Me Pja, but locals often call it Me Pia. Me Pia Pass is a famous pass in Cao Bang, located on National Highway 4A, 2.5 km long, extending from Xuan Truong commune to the center of Bao Lac (a district bordering China). The pass consists of 14 steep floors, with bends, winding and winding roads. On both sides of the pass are high mountain ranges. (Photo: Vietnamroadtrip) It is said that the Me Pia pass dates back to the French colonial period, which was originally just a trail that could only be passed by horseback. The widest part of the pass is only about 40 cm. It was not until 2009 that the new pass was built and completed in 2011. Now, the pass is opened to be more open, with a width of about 5 m. Because of the ruggedness and picturesque winding, this road is always a place where many domestic and foreign backpackers when coming to the Northeast, typically Cao Bang, want to conquer. (Photo: Internet) Unlike other passes in Vietnam, you only need to reach the top to catch a panoramic view of the magnificence of this 14-storey pass. To reach the highest point of the pass, you need to trek through the forest along its slopes. In the layer of floating white clouds, the Me Pia pass appears winding, with winding bends, cascading like stairs to the “top of the sky”. The majesty of the natural landscape of the Northeast mountains, makes any visitor who can see it firsthand feel overwhelmed. (Photo: Internet) The time to climb up to the panoramic view point of the pass is about 1 hour (both up and down). Therefore, you need to bring water and snacks. Absolutely do not litter in the forest, in the route. If you see garbage, plastic water bottles, you can pick them up and bring them down the mountain to throw them away. (Photo: Internet) (Photo: Internet) Due to the rugged mountainous terrain, all roads in the Northeast provinces are very difficult to move, only for skilled drivers. So, if you decide to drive your own car or travel by motorbike to Me Pia pass, you need to make sure that your ability to cope with all situations.

Photo: BI Also known as “The Ice”, the Sea Ice Runway in Antarctica is not paved with any material. And if this isn’t scary enough, it’s entirely made of… ice and can crack under the weight of an airplane. As temperatures rise and the ice melts, there aren’t any runways for planes to land on. Princess Juliana International Airport, St. Maarten, USA Photo: BI Princess Juliana International Airport, St. Maarten, USA is probably scarier for people sunbathing on the beach than for passengers. The airport’s runway is quite short and it ends right near the beach. This means the plane must fly extremely low, before landing. Beachgoers will “enjoy” a strange experience with extremely loud noises and strong winds. Paro Airport, Paro, Bhutan Photo: BI The only international airport in Bhutan is Paro located at an altitude of 2.23 km above sea level and surrounded by the Himalayas with the highest peak reaching 4.87 km. All of this makes only the most veteran pilots allowed to fly here. Barra Airport, Eologarry, Scotland Photo: BI You might be surprised to learn that planes will have to land on sand at Barra Airport in Scotland. Due to its location on the coast, one must also calculate the time to land the plane at no tide. At that time, the “runway” will completely disappear. Juancho E. Yrausquin Airport, Saba Island, Netherlands Photo: BI If the extreme winds generated by the mountains haven’t made you shiver, the less than 400-meter runway of Juancho E. Yrausquin Airport is sure to make even the bravest tremble. Narsaruaq Airport, Greenland Photo: BI Winds and turbulence at Narsaruaq Airport are so frequent that take-offs and landings are only allowed during the day. Pilots here also need to make 90-degree turns to line up planes on the flight path – this is especially hard when it’s windy. Gibraltar International Airport, Gibraltar Photo: BI Besides terminating in a harbour, the runway of Gibraltar International Airport intersects Winston Churchill Avenue, one of the bustling neighbourhoods. most Gibraltar. (It has to close every time a plane lands.) Madeira Airport, Portugal Photo: BI Known as the most dangerous airport in Europe, pilots face hills on one side and the sea on the other when operating at this airport. Its runway is also windy and very short. Qamdo Bamda Airport, China Photo: BI Qamdo Bamda Airport used to be the tallest airport in the world. However, at an altitude of 4.33 km above sea level, the thin air also makes landing more difficult than ever. In return, the airport has the longest runway runway in the world, at 5.47 km. Gustaf II Airport, St. Barths Photo: BI At 640 meters long, the runway of Gustaf II airport is not only short but also ends at a public beach full of tourists. Matekane Air Strip, Matekane, Lesotho Photo: BI The runway at this airport is about 400 meters, but the abyss below it is more than 600 meters deep. Many people therefore liken these planes on the runway to a bird rushing out of its nest to practice flying. Ketchikan International Airport, Alaska Photo: BI Ketchikan International Airport often freezes because of its special geographical location near mountains, sea and cold winds. Tenzing-Hillary Airport, Nepal Photo: BI Tenzing-Hillary Airport, Nepal has one of the steepest runways in the world and ends in the majestic Himalayas. It is understandable that flights are only allowed to take off or land during the day and weather permitting. Courchevel Airport, France Photo: BI Not only short, the flight path at Courchevel airport also has a slope of 18.5%. Not to mention that it is surrounded by many rocky mountains.