An older design for an AK bullpup has surfaced from a trade show in the Ukraine, named the “Malyuk” and coming from a company called Interproinvest. Work was started on it in 2005. Essentially it appears to be an AK bullpupized, with the addition of a smoother magazine retention system, charging handle to the front, full length top picatinny rail, magazine release more of an AR type quick release than an AK one, and trigger group moved forward of the magazine. Other than that, the internals are all Kalashnikov. An article came out in the Ukrainian english version of a Defense Review, skip to page 48 here, or if you just want to read the article directly. Currently it is in 5.45x39mm and 7.62x39mm, the company is interested in contracts with the Ukrainian Army. A good summary of the rifle comes from a Reddit post about it–

The rifle is essentially a bullpup AK, though with some obvious modification. It was a private endeavor, with interest from the Ukrainian government but no direct involvement. The rifle is intended to replace soviet AK-variant 5.45 and 7.62 rifles in Ukraine. The company’s main benefit, as they say, is the rifle modifies an existing platform as opposed to the Fort 221(another Ukrainian company manufacturing a Tavor-clone) which relies on foreign-made parts.

• Weight – 7.04lbs
• Overall Length – 27.95″
• Barrel Length – 16.33″

Another description of the rifle comes from Army Recognition–

A quick detachable suppressor is also available. The magazine is mounted within a dedicated shaft, which not only facilitates better fixation, but is designed so that to allow the magazine to fall down under its own weight with a press of the release button located next to the trigger, and it is easy to load into the receiver from whatever position the shooter chooses to take.

The weapon’s design makes an optimal use of the energy of the combustion gases. The barrel is cooled by air convection, resulting in a longer barrel life, which is twice that of Kalashnikov rifle.

The Malyuk automatic rifle is designed to be ambidextrous for both right-hand and left-hand shooters. The ergonomic bolt handle doesn’t move when firing to preclude finger or chin injuries.

The Malyuk has had its recoil reduced by almost 50 percent as compared to that in the Kalashnikov rifle, and its design to allow the key operations – unlocking firing, removing and replacing the magazine and reloading – to be done with a single hand.

The Malyuk has a total weight of 3,2 kg without the magazine, it has a maximum range of 500 m and can be adapted for different types of caliber as 5.45, 7.62 x 39mm or 5.56 x 45 mm.