What knex gun should I build next?

I am trying to figure out which gun I want to build next. I have thought of 4 knex guns that have very promising designs in my opinion but don't have the time or parts to build all at once. Here is what I am wanting to build. 
A Trench gun. Shell ejection, pump action and all.
A f2000. Fully automatic, large mag with red dot sight.
A hand held gatling with high bullet capitivity. ( Not a hand held gatling with a rod and a rubber band on each bullet holder thing like a bunch of tiny guns.)
A folding mounted turret with VERY high bullet capitivity.

None of these guns will need modified pieces that I can tell from my on paper plans. I would just like to see which of these everyone would be most excited to see. Don't be shy. Let me know what you think.
Pics are in order of what I said them in.

Comments

[ShadowKnight16]

I think the trench gun design not only because of the shell ejection but mainly because not many people have done it before.

[ShadowKnight16]

Correction no one has done it before on instructables. So it would be a first.

[Drew99-KGB]

Ok, I have made most of the gun. It is a very hard and complicated gun to build and at this time, it does not have a working pump. One has been done before but on youtube but it doesn't look like a trench gun, or even a gun.

[ShadowKnight16]

Does it have the shell ejection?

[Drew99-KGB]

Yes it does. It is a really complicated gun to build so it's taking me alot longer then a expected. Sorry about that.

[ShadowKnight16]

Dont worry about it, as long as it functions well I think we will all be happy. :)

[AUG-5OM3]

If this is still running I'd like to see the trench gun with working pump-action, and if you manage to even get a shell ejection; that would be awesome!

-AUG-5OM3-

[Drew99-KGB]

I have already done a shell ejection gun. If you are talking about just getting the shell ejection on the trench gun. I would agree. I have already made a trench gun prototype. Trying to make it to where I can make the ammo box behind the pump. Thanks for your input!!

[AUG-5OM3]

No problem, I guess I'll see the pictures up sometime.

-AUG-5OM3-

[Drew99-KGB]

Sometime soon I may be able to finish it soon. I will not be posting until I get it just the way I want it.