As of this writing, Classic Army produces several AK replicas.

The SLR105U





-- Steel Metal Frame
-- High Performance Motor
-- 7mm Oily Steel Bearing Gear Box
-- Real Gun Logo With Unique Serial Number
-- Wooden Hand Guard and Metal Folding Stock

the SLR105 AI Para





-- Reinforced Parts (Gear Set, Sealed Cylinded and Air Nozzle)
-- Bearing Spring Guide and Piston Head
-- Wooden Force Grip and Stock
-- Hi-Cap Magazine (500Rd)
-- High Performance Motor
-- Steel Metal Frame, Flash Hider & Scope Rail

the SLR105 A1 (Compact) Steel Version



-- Steel Metal Frame
-- Wooden Hand Guard and Stock
-- High Performance Motor
-- Real Gun Logo With Unique Serial Number
-- 7mm Oily Steel Bearing Gear Box

the SLR105 A1 (Steel Version)





-- Metal Scope Rail, Steel Flash Hider & Metal Frame
-- Wooden Hand Guard and Stock
-- High Performance Motor, 7mm Metal Bearing Gear Box, Bearing Spring Guide and Piston Head
-- Reinforced Parts (Gear Set, Sealed Cylinder and Air Nozzle)
-- Real Gun Logo With Unique Serial Number
-- Hi Cap Magazine (500 Rd)

source: Classic Army