The basic AK is the Russian-pattern model. It has a fixed stock, and a very simple design. It's my favorite AK to build,
because of its simplicity, and the fact that all my building jigs fit it perfectly. The receiver can be pressed out of a
piece of sheet metal that you can buy at AK-Builder for less than $20, and
you can press it using a 12-ton shop press available at Harbor Freight and a press-jig also from AK-Builder. You can
make your own bending jig for less than $40 if you are so
inclined. This epitomizes the spirit of home-building if you ask me, but since I got my jig years before the grasshopper
jig was invented I'll go with mine.