After doing some testing with the Revenant’s projectile blocker and destroyer (hammer 4 and Centaur stance 7, respectively) I discovered that not all ranged attacks are considered projectiles by the block mechanism and therefore aren’t blocked.
Here is a link to that thread in the PvP section of the forum incase any fellow Revenants are interested.
https://forum-en.gw2archive.eu/forum/game/pvp/What-constitutes-a-projectile/