Yup, Krylon. Satin Black for the base layer on the M4 lower, as well as the frame on the KJW G23 (it's the Cansoft version from 007). Then I used a muddled, oversprayed mix of gray primer, camo tan and OD on the rifle. It works well where we play, lots of gray rocks around, as well as pale birch bark. ACU works well in th YK area.
Delenda Est Carthago