7 replies to this topic

[Muttonchops]

Now, after bringing a recon and a NF to my first war, I realized I needed to up my arsenal. I decided to go with a BBB and a at2k, but I thought hauling both of them around would be a bitch. After looking around the forums, I saw many people had integrated at2ks into their bows. I liked the idea, but thought there was major room for improvement.

Barrel Turret


Step 1: All the materials needed. Yes, i know its a lot. Stop wining, its worth it.


Step 2: Open up your BBB, keep all the screws and other bits together. All the screws are the same size, so don't worry about keeping order.


Step 3: Pull out the AR, show above. Its located in the front barrel. Some people keep the white disk; I've found a way to do away with it.


Step 4: Cut off the barrel, and place a length of cpvc into the gap, flush with the 'spokes.' Look at all that dead space. Lets fill it up with something that will both fill cleanly and cushion the plunger


Step 5: The answer: Liquid silicone rubber. You can find it at any aquarium store. I started with a small vial, but got pissed off and used the caulk gun.


Look at that seal. Fills up dead space AND protects the plunger head


Step 6: The end of the orange front piece thing has now been cut and sanded down


Step 7: Using a piece of 3/8 inch tygon tubing, connect the turret of the at2k to the new front, making sure it is air tight

AT2K Integration


Step 8: Here is the at2k pump assembly placed in the upper BBB guide rail. Almost a perfect fit, no? Just sand down the chamber until the pump tube is comfortable. Replace the yellow tubing with more tygon hose.


Step 9: See those? They will be connecting our pump to the air chamber. The reason I went with connectors is so the AT2K tank would not blow up after firing several rounds, as I plugged the air release

Step 10: Unfortunately, the picture I took did not come out. The pump arm was connected to the BBB 'guide' arm by means of a zip-tie through a screw hole. Make sure the pump is fully compressed at the guns resting position. Due to the fact I used a zip-tie, I had to cut a small portion of the wall out to insure smooth firing.



Step 11: Now that all internal things are done, we can start putting the gun back together. Place all screws into their respective spots. You may notice the turret wobbles; pretty useless. Cut apart the at2k shell down and fit it over the BBB front. Screw the at2k together (you did leave screws, right?) and proceed to tape / hot glue the turret in place

Finally, all that remains is to place the air tank of the at2k in a location where it will be useful.



Step 12: Cut apart the back 'scope' and fit the at2k tank in the back. I used a cpvc coupler to accept barrels, thus I can use a removable barrel system for reloading.

And that's about it. The finished product:


Ain't she a beaut? Currently I am experimenting with different size barrels, so the PETG is not permanent yet. Currently I am getting shots of about 70 feet with the turret. Once I find a set barrel size I will report more accurate ranges. Also, in the above picture you can see where I attached the pump arm to the guide arm with the zip tie.

The gun would have a respectable ROF and power, the only problem being a bitch of a load time. I believe the at2k solves that, and can also allow for some longer ranged careful shots, though I personally would keep the reserve for catching someone while I reload. The at2k is simply fired by pulling back on the pin. Not the most elegant way, I know, but effective.

Several improvements remain, such as making a gear to rotate the barrels as I fire or doing a spring replacement. As it is, I am happy with my new Big Bad Beast. As this is my first write-up, any feedback would be greatly appreciated. Thank you.

[TimmyTown]

Haha, seems like a less beautiful version of mine, with a worse name.

However, I very much like it.

Norther of heaven did the thing before me, but mines is turreted and yours is more like mine then his. I also did the pump in tuby thing second, but since I had never seen his i take just as much credit.


You werent the first, and your 2k is in an inconvenient place. However, it is a nice mod none the less.

I will post the link to mine and let norther gloat on his own, seeing as how he is also viewing this thread.

Linky: http://nerfhaven.com...topic=13575&hl=

[Norther of Heaven]

It seems a little bit "put-together" if you know what I mean, but otherwise it seems fine. Got any plans for the 2K's trigger?

[rork]

It's hacked up, there's glue, there's odd shell pieces, there's loose hose, it's totally jury-rigged--and i fucking love it. This wasn't built to impress; it was built to shoot your friends with. Bravo.

[TimmyTown]

It's hacked up, there's glue, there's odd shell pieces, there's loose hose, it's totally jury-rigged--and i fucking love it. This wasn't built to impress; it was built to shoot your friends with. Bravo.

I support this statement in every way.

[Lynx]

Not so much on supporting that statement since the 2k is out of place and could be in a better place with a small bit of planning. Plan just a little bit and you'll be fine (usually).

[Split]

I doubt that turret will be lasting a whole war though. You going to be able to make it to GankFest?

[Muttonchops]

@ Timmy: I had not seen your BBB write up, otherwise I probably would not have posted mine. I like the at2k location, though.

@ Norther: I had seen your integration and liked the idea; my difference was I wanted the turret on the BBB itself and use the 2k for pot shots and 'Oh crap, I'm reloading and hes charging' shots.

Regarding the 2k trigger, I am planning on making a small pull ring, similar to Timmys (Again, Bravo, I like that placement).

@ Rork: Thank you. This is my first major modification and write up. It does look fugly, but it works. I am also waiting on painting in and gluing everything down until after thanksgiving; I am going to be doing a spring replacement, probably with an Ace #49.

@ Splitlip: The turret itself is surprisingly stable. The e-tape and hot glue are holding it together nicely, and gives good support for rotating barrels. I will be reinforcing the barrels themselves after I find a good length, putting a sleeve of 1/2 inch PVC over each, with a small cut out at the base so I can check if darts are loaded or not.

EDIT: I Just did some quick range tests, and I am getting about 60-80 feet when I load the dart part way into the barrel. So yeah, the PETG is too much. I'll be cutting down to 6 inches and see if I get more stable results

And Gankfest is a big maybe for me. I saw it but did not respond, I figure I would rather give a definite answer.

Edited by Deamonn, 24 November 2008 - 12:05 PM.