This is rather dated on my Brickshelf account but I thought I would post it for reviews anyway as it is a slightly different style to many of my other MOCs. It took literally no more than 15 minutes to knock together and had no rebuilding, the first part to go on stayed on.
With that in mind it turned out surprisingly sturdy and completely stud-free, using mostly SNOT construction. I enjoyed the exercise so much I had another go but didn't do so well second time round (see brickshelf account).
The 4 barrels are classic recoil artillery cannons designed to fire one at a time in succession while the others reload, allowing it to keep up a constant bombardment. The two shorter barrels are mid-range howitzers to slow down incoming enemies during retreat or setup.
The rear jumpjets are not to allow flight, but to provide a counter-force so that all 4 barrels can be unleashed simultaneously without pushing itself off a cliff edge from the recoil.
This is my favorite of your MOCs just because it is a military mech, not a anime-looking mech. (Nothing against them; I just don't like that style, is all.) Good job on making it studless. I like studs. I have nothing against studs. Great job, for a 15 minute creatoon. Also, the legs are very well done. I like the little rocket pieces for the feet; I may have to try that. :) Hasta.