I'm also working on some more weapons for the Armorcast Reaver Titan. Ever since the guys at Forge World came out with the rules for their Reaver Titans us Armorcast owners have had a bit of weapon envy.
(In case you aren't aware, the Armorcast Reaver Titan's arm weapons are the same as a Warhound Titan's. The Forge World Reaver's arm weapons are slightly down-graded versions of Warlord Titan weapons, but are significantly more powerful than Warhound weapons.)
I've already made versions of the Volcano Cannon and Laser Blaster. Since doing so most of the Apocalypse groups around the country have adopted a house rule that addresses how much more powerful the Destroyer-strength weapons are than any other weapon. The house rule reduces the template size of any Destroyer weapon to the next lower size. (10" becomes 7", 5" becomes 3", etc.) Now that we're playing with this rule, all of a sudden the other weapons become more viable. In the case of the Reaver, this makes the Melta Cannon and Gatling Blaster more useful.
Here is my initial take on the Melta Cannon. You can reference the Forge World version here. The stock (red and black) is from one of my Volcano Cannons and is used for scale because the one for the Melta Cannon will be approximately the same size. It will have the same lines and designs as the Armorcast Inferno Gun but will be bulkier.
The Gatling Blaster is the same deal. It will follow the lines of the Armorcast weapon. In addition to what you see below I will have a method to allow it to rotate.