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Status update (Update: Barackuda soon to post) Answered

Hey, peoples. 

I'm rather sad to see the community dying but I figured I'll cling on a little longer, try to spark some more activity if possible. I see people still posting instructions, so that's good. Just wish we'd keep more discussion going on the forums. Anyway, a couple things:

Just to show what I have around, I tried to make something after my Barackuda but didn't end up going anywhere. I just wanted to have something around, so I remade and improved my SMRI model. This version was designed solely for looks based off my last version. I couldn't really be bothered to try making this one shoot. It still uses Red's stock because I couldn't think of a better design at the time. Anywho, this wasn't meant to be the impressive bit, just something to show while yabbering. =P 

With the Barackuda and the SMRI, I realized that I'm still limited in a few pieces. I desperately need more dark greys, oranges, and black hands. I also realized I feel bad destroying guns and never keeping them around so that I can build new ones. I figure I might as well build my collection up so I can keep more guns around. So I've ordered more pieces. I'll get them probably some time early next week. I'm hoping to build something right away. I'm thinking of revisiting my Barackuda to see if I can improve the trigger and feed ramp. I might redesign it entirely. I'm hoping to attempt a repeating slingshot of some form at some point too. But it's an area I've never worked in before so I might get discouraged pretty quick. I dunno, I need to try actually building these ideas I have sitting in my head for years. I'll post more in here once I get the pieces and start building something.

Update 2/19/16: 
I'm mostly finished with my new version of the Barackuda. I filled in the empty gaps on the rods of the magazine to make it fuller looking. The trigger -should- work better now but I just noticed it struggles to set when it's still pulled back while cocking. I suspect I just need a better band setup to resolve this, otherwise it works fine when you manually push the trigger forward. Last, the stock was changed entirely to give the bolt a rail to glide inside of with a solid bolt stop right after the trigger engages, allowing for a quick and smooth action. The handle connection is also more sturdy, so the stock is surprisingly rigid. Overall I'm much more pleased with this version, as long as I can figure out the trigger bands this might be posted. I'll begin working on yet another remake of the UMP soon.

Update 11/9/16: 
Man, the year sure flew by. I apologize for never really getting around to posting the Barackuda before. This time I think I've finally gotten over my perfectionism. I've adjusted the stock to keep the same track design but attached it differently and otherwise made the rest of the stock use less pieces. I've figured out a (I think) new pair of K'nex sights more precise than our usual chunky ones, not that it'll help much. The trigger and back of the gun has been adjusted to block the pin further back, hopefully improving range slightly. The front of the gun was made more compact and flat at the bottom to allow potential changes to the front of the magazine in the future. It also makes muzzle loading much easier in tandem with the new ramp. The ramp is also simpler, more consistent, and hopefully offers better range than my other ones. Finally, the magazine has been adjusted to be easier to load and hopefully more reliable. I'd finally say this is a practical war weapon alternative. I'll post this...hopefully sooner rather than later. This time I mean it. 




I was wondering if you could post a few detailed pictures so people who really want to build this can work it out themselves.


While I've made very minor improvements, I do have a few internals already posted. What kind of pictures would be most helpful?

A few extra pictures of the magazine, the trigger mechanism, the part that connects to the magazine up front, the connection between the stock and handle and the ram guide would be very much appreciated.

Alrighty, I'll set a reminder for myself after work and I'll take those, perhaps even a full instruction set if I can be bothered. I've delayed it long enough.

That sounds great!
I really look forward to building it!

Alright, so I don't have the time to do a full instructable, but I got enough pictures that I'm just going to make a new thread for it. Look out for that.

Any update on the status of this gun? I would love to build it when and if it gets posted!

Hey, sorry for just sorta going dead. If I can remember to, I'll try to get instructions sometime this week. There's just been so little activity I didn't figure anyone would build it anyway. It's been so long, I forget what, if any, improvements I made since the internals I took previously, but I'll try to make a full instructable regardless. Hope it'll be worth the wait.

Off at college at the moment, but would definitely build it over vacation just for fun. Thanks for staying around, I look forward to seeing your repeating slingshot :)

When's your next vacation then, Christmas? If you do, hope you like it.
Haha, which one was that one? I've had a few ideas but I think the one I mentioned was to attempt using fin ammo in a repeating slingshot? It's hard to get motivated to try it, but I swear I'll get to it one day...

I'd almost recommend a belt-fed design if using finammo as you can just carry it on top of the belt and have bands pull it off of it through an open-side chamber

Hey! Nice to see you around.

Very interesting design and mechanics. I love how it looks so minimalistic.

Do you know when you will release instructions for it?

Thanks, been rather inactive, but I check in now and then. Long story short, I keep wanting to post instructions, but then I always find a thing or two I want to improve so I fiddle with it some more, then I hit a roadblock and take a break for a while. I could get more pictures, though.

I think you should post it when you truly feel like you completed the gun.

As for the gun, I tried building it yesterday from the current pictures but there were some things that were unclear to me. I finished the gun except for the mag, but because some things weren't on the pictures I had to improvise. The finished build was quite flimsy and I think this is because I did not build it correctly. If you could post some more detailed pictures of the gun and especially the parts which you think need extra attention, that would be appreciated.

I feel like if you took the time to reinforce the whole body and make the mag and trigger work flawlessly and smooth, this could result in a great gun.

Dunno why I keep posting here but I'm happy to say the Barackuda is coming along nicely. Changed the stock, trigger, front + ramp, and magazine since the version in the picture, so I'm gonna finish it up, get a new picture, and then maybe get another video. Then I want to be done with it... I've been meaning to post it but haven't quite been satisfied enough with it at any point.

Latest version:
1. Cleaned up the stock connection a little, changed the design a little bit, keeps same basic bolt trough.

2. Improved trigger to block pin a little further back.

3. Added rear peep sight with front post sight, about as effective as K'nex sight are going to get.

4. Changed front of gun to be more compact, have simple ramp, to be flat on the bottom (in case I add more to the front of the magazine), and to be easily muzzle loaded. While I don't like the looks of this one as much, I figure the practicality overrides the aesthetics in this case.

5. Finally, I removed the gears from the magazine, used another piece which lets the ammo flow freely. It's not really a rotary magazine anymore, more a small drum magazine. Anyway, filling the magazine should be much easier now, just drop ammo in, no need to push.


I say just post internals now and let others mod if they please. I know I certainly want to.

Fair enough. I think I'm pretty much ready to post full on instructions. Made a few minor changes but otherwise there's nothing big I want to change at this point. I just want to testfire it and make sure it's reliable. Once I do, would you be able to do a review?

Sure, I'd be happy to. I don't see a need for full instruction, but do as you wish. I look forward to it.

Cool, thanks! I can get internals first then, but I figure for potential newbs I should post full instructions later. Would like to somehow boost activity by getting more people interested in K'nex gunning.

Great, send them in a PM or something so I can get building. But regarding that, I just don't think kids are playing with K'nex as much as when I was younger.

Hey, sorry for the wait. I've updated the thread with internals, though I rushed them so let me know if there's anything you can't figure out. I suppose I should probably rip open the stock too.

Sorry, just been really preoccupied with other things so I haven't done much lately. Been looking for a house actually, and I figured once I have one I'd be spending more time building and start producing a video guide series. I still intend to post my Barackuda but I made some more tweaks because I just can't leave it alone.

Thats sounds great for you man, good luck with the house and stuff. I've just been working you know and thats good news for the gun, I can't wait to build it.

You haven't posted a gun in a long time! You should post this gun and put it in one of the unofficial knex gun contests.

Just wondering, why have so many K'NEX contests sprung up over the past few weeks? Were they inspired by my origional post?

No idea. Yours was the first, than everyone else posted theirs. The reason I posted mine was there was lots of half-baked contests (your was good, though) and I wanted one without a certain theme and I wanted it to have better prizes.

By far the worst combination: perfectionism and procrastination. I need to just post this and then make updates after the fact. I've made a couple other tweaks to the design. I'm working on making the handle more comfortable because it really wears into my thumb web after prolonged shooting. And then I opened up a gap in the magazine so that it can be topped off while loaded in the gun.

I'm such an idiot, a long-needed change I finally recognized tonight. I never noticed what was going on while firing but could tell that the weapon just didn't seem as strong as it ought to be even with my improved trigger. I figured out that when pulling the trigger, it actually ends up pushing the bolt handle back about a cm, more than the distance required to hit a bullet, so a lot of energy would be wasted in resetting the bolt handle before actually hitting the round. I haven't tested it much because my room is only so big but I think there's a quite noticeable improvement in power per band. Other benefits is that I've made the stock connection slightly sturdier and the bolt pin more stable in the process.

I suppose I'll end up getting a final video and then trying to convince myself to post it this weekend no matter what else might be able to be improved. It's been like a year, I just have to get it over with. I've also been toying with other ideas, might revisit making the SMRI shoot as I've finally figured out a simple trigger systsem to go with my pin, but I don't know if the design would be power efficient enough to get a round to leave the barrel without spinning out and colliding inside the front of the weapon.

I am looking forward to seeing the gun! BTW if you think that I should extend my contest's deadline, then by all means let me know.

Thanks. And I think it's plenty long as is. Part of making sure people actually post is by having a strict enough deadline that they can't keep putting stuff off. I didn't quite get around to posting the Barackuda this weekend but I'm hoping to sit down and do it tonight. I took another video just to tell myself "OK, this is the version being posted and this video is going up with the instructions." I want to get at least one other weapon submitted.

Dude I can't wait. It will put some juice in the knex comm

Man the audacity I have to claim I'll post something soon, ha. I got some pictures at least. I mean, it pretty much is ready, now I just gotta be patient enough to get all the the pictures some day. Last night I tinkered around and I ended up making a simple trigger safety mechanism. However, it only blocks the trigger, not the actual pin-catching part so there's still the chance the weapon can accidentally discharge if like dropped or snagged. Currently toying around with increasing the magazine capacity still with no such luck yet.

What is this? A PP-Bizon?

Nah, it wasn't designed to look like anything, just to be a bolt action that used a small drum magazine. It's moreso designed to shoot as far as it can and be fairly compact.

Very superficially because of the long, small drum magazine.

Not a model, just a gun with a rotating drum mag.

Looks great! I was considering posting up my TR8 again cause the latests variation is far different than the current instructions posted. Anything to keep the community interested and improving.