I have recently been on an AKS-74U kick. The AKS-74U has always held a special place in my heart because it was the beginning of tacticool. After realizing us yankees were on to something with our weight saving little poodle shooter, the Ruskies decided they needed a smaller caliber rifle too. Enter the AK-74. A few years later, they chopped it up, made some changes here and there, and you get one slick little PDW (even though they didn’t call it that). The main differences are: a folding stock, hinged receiver cover, shortened gas system, and a combination flash suppressor and gas booster to aid in the reliability department. Some day, when California either gets liberated or I decide to leave, I will be making an AKS-74U SBR from a parts kit. In the meantime, I will share some pictures of this sweet little rifle.
This one appears to be made from a Draco AK-47 pistol
And one in .300BLK, almost perfect except for the fixed stock.
Dive! Dive!
bubbleheadgunnut 
It has a Russian left side folding stock. Possibly one of the very best folders out there.