Some kind of door guns would look extremely nice. I think a Minigun would be good because of the mostly round shape of your Model
Maybe you could add this later 
Nice Work
Thanks for nice comments guys, guns is definitely on plan (even when I dont like aggressive things), at least they will be equippable, since this is mainly transport helicopter.
By the way, I want show you one concept render of helicopter hangar, what I did one year ago. It is not perfect, since my skill was not so good as today. But, it is something.
Everything done in Blender, outside background is screenshot from original Avatar movie.
Hope you like this.
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So happy for that five stars on this thread, many thanks to everyone.
And another render of tail.
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Awesome material in that. Looking fabulous.
Looks great! I noticed the hoses/conduits you made, from one of the earlier pics in this thread. I thought they looked great!
Thank you both, I really appreciate that.
Not much, just screenshot directly from viewport how it looks so far. I have one week break from this project so just few things was added. But I like it a lot.
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Insane! I can’t wait for a textured render. Awesome work!
Thank you sir! I can promise textures will be same insane as modeling.