hey man- cool little groove and your guitar playing is pretty tight so that's good
is there and bass guitar going on here? adding it would enhance your overall perception of the "heaviness" of the guitar tone... i find you can make almost any reasonable guitar tone sound heavy if you've got a good, wide bass track locked in there
if you don't own a bass, you can always pitch shift down the bass part played on a clean guitar, you'd be surprised how well it works once it's in the mix
you may have to cut some of that sub low out of your kick drum though (which is pretty boomy) to sit properly with the bass
hope this helps!