not too much more than about 2-3 hours plus drying time . . .
i just used your standard krylon dry coat spray paint, downloaded the multicam pattern online and printed it, then cut out stencils.
I did a base coat of desert tan, then used a variation of greens, browns, and a white to try my best to simulate the faded stencils and overlapping colors but this was my first attempt so im going to try again on some other guns.