If you're not wanting to remove the front sight I highly doubt he's wanting to cut up the delta ring.
Removing the front sight block is easy as long as your muzzle devise isn't pinned. Cutting the delta ring off is simple as well but was a little nerve racking doing it on a rifle w/ a $155 pinned muzzle devise. Mess anything up and I'd be cutting off the MD.
That's about as good as your going to get in a 2 piece without removing the front sight , not have a ton of rail and still have a free float hand guard . It's expensive yes but keep in mind troy makes great handguards that will last a lifetime . Speaking of Troy anyone try the squid grips yet ?