The MB47 combines the rugged heritage of the AK platform with modern American manufacturing and accessory compatibility. Featuring a rigid milled receiver, free-floated handguard, and multiple optic mounting options, it delivers improved accuracy and adaptability compared to many traditional AK rifles. While heavier than some alternatives, its stability, reliability, and modern features make it a compelling option for shooters seeking a refined version of the classic AK design.
The MB47 rifle represents a collaboration between Century Arms and Sharps Bros.. The goal behind the project was simple: build a modern American-made AK that preserves the traditional strengths of the platform while incorporating contemporary materials, manufacturing methods, and accessory compatibility.
The result is a rifle that blends classic AK design with modern upgrades. While it maintains the rugged reliability the platform is known for, it introduces enhancements aimed at improving accuracy, optics mounting, and overall shooting performance.
One of the most distinctive aspects of the MB47 is its milled steel receiver. Early versions of the AK-47 used milled receivers before production shifted to stamped designs with the later AKM. Stamped receivers were cheaper and faster to produce, making them better suited for mass military adoption.
Some countries, however, continued to produce rifles with milled receivers due to their increased rigidity. The added stiffness can provide a more stable platform for optics and potentially improve mechanical accuracy.
Sharps Bros. manufactures the MB47 receiver from a solid billet of steel, finished with a black phosphate coating. The design also incorporates quick-detach sling sockets directly into the receiver, eliminating the need for additional hardware.
The MB47 comes equipped with several modern features designed to improve versatility. A free-floated M-LOK handguard allows the attachment of accessories such as lights, grips, or bipods.
An Ultimak Picatinny gas tube rail is also included, offering a forward mounting location for optics. Combined with the traditional Warsaw Pact-style side rail, the rifle supports a wide range of optic configurations.
Other components include:
Together, these features give the rifle a distinctly modern layout while preserving the familiar AK manual of arms.
The MB47 is chambered in 7.62×39mm and uses the standard AK long-stroke gas piston system. This operating system has earned a reputation for reliability in harsh conditions.
The rifle uses a 16.25-inch chrome-lined barrel with fluting to help reduce weight and improve cooling. Standard 5/8x24 muzzle threads allow shooters to install a wide variety of muzzle devices, including suppressor mounts, flash hiders, and alternative compensators.
Another unusual feature is the bolt carrier, which incorporates a cutaway section along the top to reduce weight. This modification slightly changes the balance and cycling characteristics of the rifle.
Despite weight-reduction measures, the rifle still weighs about 8.4 pounds unloaded. Once optics and accessories are added, total weight can easily exceed ten pounds.
Although heavier than many AK-pattern rifles, the MB47’s weight distribution works in its favor. Much of the mass sits toward the rear of the rifle, creating a stable shooting platform.
Combined with the rifle’s compensator and relatively low bore axis, recoil impulse is mild for a 7.62×39 platform. Rapid follow-up shots are easy to control, and the rifle remains stable during sustained fire.
Ejection is energetic, typically sending spent casings several feet forward and to the right, which is typical for AK-pattern rifles.
Accuracy testing revealed results that stand out compared to many traditional AK rifles. Typical AKM-pattern rifles often produce groups in the 4–5 MOA range with standard ammunition.
During testing at 100 yards from a bench rest, the MB47 delivered significantly tighter groups with several types of ammunition. Some loads produced groups just over 1.5 MOA using standard ball ammunition.
Additional testing with various loads produced the following results:
These results highlight how modern manufacturing and better ammunition can significantly improve performance compared to older military AK rifles.
One interesting observation during testing involved a phenomenon sometimes seen with AK rifles. Because cartridges feed from a double-stack magazine, rounds entering the chamber from the left and right sides may produce slightly different points of impact.
This can result in two small clusters of shots that appear slightly offset from one another, increasing the overall group size. Using single-feed magazines such as drums can sometimes reduce this effect.
Despite this quirk, the MB47 proved capable of consistent hits on silhouette targets out to roughly 300 yards, which aligns well with the practical effective range of the 7.62×39 cartridge.
Reliability testing included a wide variety of both steel- and brass-cased ammunition. Throughout testing, the rifle experienced no malfunctions.
This level of reliability is consistent with the reputation of the AK platform. Even with modern modifications and tighter manufacturing tolerances, the MB47 maintained the durability and dependable operation expected from this type of rifle.
The only control that required extra effort was the safety lever, which was somewhat stiff during operation. However, the tension can be adjusted by removing and slightly reshaping the lever if necessary.
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