I would avoid "camo" as a pattern
Instead, if anything, I'd do a solid OD green "Paint" layer over what you already have, and then wear that down in spots (that way you're not fucking up the rifle itself, just some minor scratching/wear on the overlying paint.) And then throw a wrap on it. Like this (but without the crappy digital pattern)
Use alpha planes for some burlap, and jute.