An immediate descendent of the HK416 The MR556A1 is an automatic rifle that was developed in collaboration with Heckler & Koch as a top-of-the-line commercial civil firearm that comes with the capability of a match rifle. Much like the HK416 it is a significant advancement over the conventional AR-type rifles as well as carbines. The MR556A1 utilizes the HK exclusive gas piston operating method, making use of a piston as well as a solid pusher rod instead that of the tube for gas commonly used in AR15M16M4-type firearms. This system of operation practically completely eliminates any malfunctions commonly found with directly impingement gas system because dirty carbon and hot gas do not get into the receiver's zone of operation. This is the exact element that is crucial to the performance that is present in the HK416 rifles, which are utilized by top law enforcement and military clients. The MR556A1 rifle is made in the USA with American and German manufactured components. The MR556A1 makes use of various of the same components and accessories developed originally specifically for HK416.
Similar to the renowned HK416 The MR556A1 is equipped with a German-made barrel made by Heckler & Koch's famed cold hammer forging procedure. High-quality steel is utilized in this exclusive manufacturing process to create the barrel that has excellent accuracy and longevity of service. In contrast to the HK416 model, the MR556A1 is not the chrome-lined barrel. Chrome-lined barrels can hide bore imperfections , which can negatively impact the accuracy. For the new range of semi-automatic Heckler and Koch MR rifles HK developers and designers believe that the best accuracy is achieved with an unchromed bore. The barrel that is unchromed features an internal profile of six grooves and lands, with an 1 in 7 inch (178 millimeters) twist. It also has moderately swagged and has a lower internal diameter on the muzzle end than at the chamber's edge. This can have an effect positive on bullet speed and accuracy. The heavy, thick contour of the 16.5-inch MR556A1 barrel also contributes to its exceptional accuracy. An extremely precise two-stage trigger significantly improves the precision and accuracy of the MR556A1 and an extended charging handle for the latch helps to operate the rifle using a an telescopic view more simple. The retractable buttstock is secured into a stable fixed, non-moving location when tightening an Allen screw located in the lower part of the buttstock.
Specially designed target rifle takedown pins make sure that the upper and lower receivers are securely mated to ensure precise performance. It is designed to work with a variety of high-quality 5.56 45 mm rounds The MR556A1 makes use of an C.I.P. chamber that is dimensioned (a chamber with dimensions that are specified in the International Commission Permanente).The MR556A1 also functions reliably with the majority of high-quality Caliber .223 Remington ammunition. The MR556A1 is manufactured by the same company with the same commitment to high-end quality as German-made HK firearms. Through combined U.S.German production, Heckler & Koch leverages the strengths of two continents to produce the best AR-type firearm. It combines the design innovations from both the USA and Germany to create a brand innovative product
It is important to be clear right from the beginning It is equipped with the same reliable gas piston system as the HK416 that is common to U.S. Special Forces, particularly the Navy SEALS, which are among the most elite. It is also important to note that, as we have said before, U.S. Special Operations units aren't cheap in their equipment, nor do they remain with a particular item when it isn't producing excellent results.
The MR556A1 can be described as the civil version of the famous HK416. HK made no compromises in designing the MR556A1 watch for markets that were commercial, which made the Swiss-made quality their top priority and not compromising on manufacturing and materials.
REVIEW THE MR556A1 FDE
On the outside, the MR556A1 is akin to the AR-15/M-16 platform. However, internally it differs. Instead of the direct impingement mechanism of the AR-15/M16 that allows combustion gases to directly affect the bolt of the rifle the MR556A1 uses an a gas piston with a short stroke like the one found within the HK G36.
What is the next step for improvement begin? Direct impingement technology in the AR-15/M16's main issue is that it allows combustion gases enter interiors within the firearm. This leads to more fouling and causes more issues that could cause array of issues ranging due to jamming and shorter lives. However, the MR556A1, utilizing the short-stroke gas piston technology is driven by an operating rod to push the bolt carrier towards the rear to prevent propellant gases from getting into the internals.
The results are impressive. The MR556A1 operates cooler, more efficient and more consistently. And when difficult conditions such as dust or sand are present, the advantage that comes with the HK system is more significant. In actual tests, the HK416 could shoot 10,000 rounds at full auto without a single malfunction.
The MR556A1 also comes with a unique accessory rail forearm which includes MIL-STD-1913 rails on the four sides. This lets users outfit their MR556A1 with the latest accessories designed for M4/M16 type firearms. Furthermore the forearm of the rail can be "free-floating" and doesn't touch the barrel, which improves precision.
A further feature of the MR556A1 civilians love is that it is possible to attach any lower receiver from the M16/M4/AR-15 families to the upper receiver of the MR556A1 as the take-down pins are situated in the same place as the upper receiver.
The barrel in the MR556A1 is forged using cold hammer from the best quality cannon-grade steel. It features a 1 in seven" turn and taper bore design with a smaller size at its muzzle to ensure greater accuracy and speed. While the material as well as the cold-hammer forging itself significantly improve durability, HK's process includes a number of other steps that aren't used by other companies to ensure the highest quality of accuracy and longevity which will ensure that the product performs well over "mil-spec."
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