AKMSU
A compact carbine of uncertain origin, misattributed as a Soviet prototype.
The AKMSU is a shortened carbine based on the Soviet AKM, firing the 7.62×39mm round. While often mistaken for a Soviet prototype, available evidence indicates it was never an official Soviet design, but rather a custom-built weapon that was incorrectly labeled as such.
The carbine entered the British Ministry of Defense Pattern Room collection in June 1986. After the Pattern Room closed in September 2005, its entire collection—including this weapon—was transferred to the Royal Armouries in Leeds, England, where the AKMSU remains today. Following its arrival, the carbine appeared in various English and Russian publications, which gave it the name AKMSU and claimed it was a Soviet prototype made in either 1959 or 1975. However, no Russian armory records exist for this weapon, strongly suggesting it was not Soviet-made. Its true origin is uncertain, though it is suspected to be a one-off "Khyber Pass Copy" from Pakistan’s Khyber Pass region, an area known for small workshops producing diverse and unique firearms.
The AKMSU combines a Chinese Type 56-1 receiver with a 1977-dated AKM trunnion. Other custom parts include a muzzle brake with an expansion chamber, necessary for the rifle to cycle correctly, and multiple grooves machined into the brake for heat dissipation. It also features a custom handguard.
Quick Facts
- Origin
- Pakistan (suspected)
- Is Ranged
- yes
- Designer
- A gunsmith from Dara Adamkhel
- Design Date
- Early 1980s
- Manufacturer
- Dara dam khel
- Number
- 1
- Weight
- 2.85 Kg
- Length
- 480mm (folded) / 740mm (extended)
- Part Length
- 270mm
- Cartridge
- 7.62×39mm
- Action
- Gas operated, rotating bolt
- Rate
- 650-785 rounds/min
Facts from the source article.
Lore & Background
The carbine that would later be called the AKMSU was first received by the British Ministry of Defense Pattern Room collection in June 1986. The Pattern Room closed in September 2005, and the entire collection was gifted to the Royal Armouries in Leeds, England, where the AKMSU resides to this day. Following its reception, the carbine was documented in several English and Russian publications, and the name AKMSU was attached to the weapon. Alongside the name, the weapon was attributed with a history describing it as a Soviet prototype made in either 1959 or 1975, but no Russian armory documentation exists for it, strongly suggesting it was not a Soviet weapon.
The true origin of the AKMSU is uncertain, though it has been suspected to be a one-off 'Khyber Pass Copy' from Pakistan's Khyber Pass region, an area known for diverse and unique weapon production in small shops. The carbine is composed of a Chinese manufactured Type 56-1 receiver combined with a 1977 dated AKM trunnion. Its other custom parts include a muzzle brake required for correct functioning, containing an expansion chamber to correctly cycle the rifle, with many grooves machined into it for increased heat dispersion. It also has a custom hand guard.
Reader's Guide
The AKMSU's significance lies in its disputed origin and the questions it raises about the attribution of prototype weapons. Despite being widely documented as a Soviet prototype in English and Russian publications, the complete absence of Russian armory documentation suggests the weapon was never part of any official Soviet program. This discrepancy has led to the suspicion that the AKMSU is a one-off custom creation from the Khyber Pass region, an area known for producing unique firearms in small workshops. Its legacy is that of a mystery weapon—a compact carbine that entered the historical record through a major arms collection but whose true provenance remains unresolved. The AKMSU serves as a cautionary example of how weapons can be misidentified and acquire a false history through repeated publication, even in authoritative sources. Its continued presence in the Royal Armouries collection ensures ongoing interest among collectors and historians, though the carbine's actual origins may never be definitively established.
Did You Know?
- The AKMSU is composed of a Chinese Type 56-1 receiver and a 1977 dated AKM trunnion.
- No Russian armory documentation exists for the AKMSU, suggesting it was not a Soviet weapon.
Frequently Asked Questions
What is the AKMSU?
The AKMSU is a compact 7.62×39mm carbine assembled from mismatched parts, including a Chinese Type 56-1 receiver and a 1977-dated AKM trunnion. Despite the Soviet-sounding designation, it was never an official Soviet military design.
Is the AKMSU a genuine Soviet prototype?
No. All available evidence points to the AKMSU being a custom-built carbine that was misidentified and mislabeled as a Soviet prototype. The Soviet military never produced or designated a weapon under that name.
What parts go into the AKMSU build?
The carbine pairs a Chinese Type 56-1 receiver with a trunnion stamped 1977 from a Soviet AKM, all chambered for the 7.62×39mm round. This patchwork of origins is what makes the weapon's true provenance unclear.
Where is the AKMSU kept today?
It sits in the Royal Armouries collection in Leeds, England. The carbine moved there in September 2005 when the British Ministry of Defense Pattern Room shut down and its holdings were transferred.
How did the AKMSU end up in a British collection?
The weapon was logged into the British MoD Pattern Room in June 1986, where it was catalogued under the 'AKMSU' label. That designation likely cemented the false assumption that it represented a Soviet design rather than a one-off custom build.
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