Krylon Indoor/Outdoor Primer - Gray (#51318)
Krylon Camouflage Paint with Fusion Technology - Black (#4290)
Krylon Camouflage Paint with Fusion Technology - Khaki (#4291)
Krylon Camouflage Paint with Fusion Technology - Brown (#4292)
Krylon Camouflage Paint with Fusion Technology - Olive (#4293)
should do the trick
start with khaki, olive, brown then black
http://www.shootingillustrated.com/i...nt-your-rifle/