Unsure what to do with model

[DoomTay]

I'm still working on that old Rock Cannon model, and I'm having a bit of trouble with certain choices.

http://www.majhost.com/gallery/TaylorNuva/Otherpics/newbarrel.png

I've made a newer barrel, and I'm torn between which one to use.

And, looking at the reference (http://farm3.static.flickr.com/2596/4220849271_90b0b16703.jpg), I noticed that the triangles at the back are supposed to be curved a bit. I made three sizes (http://www.majhost.com/gallery/TaylorNuva/Otherpics/newtri.png) that I could think of along with an extra wide (http://www.majhost.com/gallery/TaylorNuva/Otherpics/extrawide.png) size. (Which I will clean up if this comes out on top.

So, which barrel, and which triangle should I use?

[Chai]

The inward barrel (left) will fit a big bang cannon gun more.
The outward (right) kinda reminds me of a silencer ... or those large caliber sniper cannons.

But I can't really tell the difference between those "triangles", looks to me like you're just nitpicking and overthinking things ?

Have you already finished building a rough model of the rest of the gun ?
Because if not, you are doing yourself a disservice by worrying about such small details this early.
The creative period is extremely short, and the longer you spend on a model the less creative you become .. I would highly recommend to focus on the form and shape of the model before you go into small details like this.

[DoomTay]

Well, this gun is actually kinda big.
Here (http://www.majhost.com/gallery/TaylorNuva/Otherpics/rccomp.png) is a view of the gun being wielded by its user. Apart from what I ask of here, the barrel is pretty much done.