Does anyone with too much time on their hands feel like re-creating the J&J 68 Special Boredrop kit?
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It LOOKS like an easy job for someone with the tooling. -
Hardest part about that thing is holding it. you basically have to make a sacrificial arbor to hold it.BeardedWorks.com (Your Inception Designs and Shocktech Dealer)
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I buy Automags and Mag Parts also.Comment
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I feel like you could drill and tap small grub screws into the body to hold it in place? That's if it moved at all. Based on the length in the pictures it looks like it wedges snuggly between the power tube and the slip fit barrel. It definitely won't spin at all with the size of the tab that connects to the linkage arm.
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That top part looks like a copper pipe. Is it a standard size?
How does this thing work exactly?View my feedback or read about my Virginia woodsball club.
Let me make you something. I build pneumags, auto-response frames, and wooden pill cases.Comment
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I do not know. I'd love it if this was just a standard size, but I've never seen one of these IRL, and I doubt I'd be that lucky. Pictures are from Facebook and an old long gone listing on Bacci's site.
It works by shrinking the breech and closing off as much of the squeegee hole as possible. Paintballs like to "over roll" And get wedged in the squeegee hole on 68 specials, leading to a lot of breaks and frustration.
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We used to use thick rubber bands to make a sort of detent.Comment
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Without the extra material on the bolt arm that is removed to make it fit int the chamber, the bolt arms break off. I have never seen an actual bolt from a kit and the sleeves I’ve seen are never installed. I modded stock bolt for a sleeve and it worked great for a few hundred shots then snapped the arm. You’d have to come up with a better solution for the bolt. Unfortunately considering the market for these it is likely a fool’s errand.Comment
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The bolt isn't the hard part. It could easily be duplicated with some Delrin stock and an aluminum rod sticking out the side. The hard part is the sleeve. If it's an off-the-shelf size just modded for the gun, though, that would make the job faster, easier, and cheaper. Otherwise someone will have to turn the whole thing out of brass and machine the grooves after, which is tricky to do with walls that thin. If you were to pay someone for this work, it would likely cost far more than the marker is worth.Originally posted by Chappy View Post
All that said, I think Myrkul is going about this the wrong way. Instead of trying to reproduce a piece of decades-old tech, I would ask the makers on here to 3D print a cover for that hole. That would be far less work and more easily reproduced. It might take a little trial and error, but they could probably make a part that press fits in there, and it could have a cap/shoulder on the top (side?) that prevents it from being pushed in too far. Then it could be held on with some glue or a strap or something.View my feedback or read about my Virginia woodsball club.
Let me make you something. I build pneumags, auto-response frames, and wooden pill cases.Comment
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Hell, and I thought I was crazy for wondering how hard it would be to cut and mill a 68 Special feedneck to accept Empire/Eclipse clamping feednecks.
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The idea occurred to me after I overtightened the feedneck and the cast aluminum shattered, but only above the relief cut. I got a replacement breech/feedneck from Bacci (now waiting on a hopper adapter as I misplaced my original). Looking at the broken one, I started to wonder whether it would be feasible to lop it off at the relief cut and mill the remainder into a clamping feedneck stub. Guess I should take some calipers to it to see how close the ID is to the Empire/Eclipse specs. Probably a completely daft idea, I know, putting a clamping feedneck on a 33 year old marker.
Maybe if I ever get around to sending you my Trilogy body for a feedneck mod I might toss in the old 68 Special breech.
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Might be a long shot, but J/J Performance seems to still be in business. Even still selling barrels if the website is correct.
You could probably check with them. Likely not going to have any in stock, but they might have a drawing or information.
J&J Performance
410 East Wood Street
Shreve, Ohio 44676
330-567-2455
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This Tippmann 68 special has the JJ breech kit in it:
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Dan that video brings back memories-
People forget that 1990-1991, the 68-special was pretty much everywhere. More popular that all other semis combined.
But by 1992, it was made completely obsolete by all the 2nd gen guns, and they pretty much vanished... though some of us tried to keep them competitive with kits like these.
At our store, we had a "anti chop" kit that we sold for $20. It was a washer with a piece of wire welded that attached to the barrel retention screw.
Prob cost a $1 to make! Easy money. We also had "anti fog" spray that was a bottle of water with a drop of dish soap. We sold paintgun oil that was really ATF fluid.
We would make homemade squeegees using rubber washers, with 12guage brushes on a wire.
Those early 90s were really the wild west. And yes, we were making homemade raincovers to sell. But still my favorite era.Comment
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-The whole sport started out that way.Originally posted by Hp_lovecraft View Post
The original "Ammo Box" loader was based off a cut-down plastic oil bottle. The original Viewloader was literally a PVC plumbing elbow, and the first of the blow-molded ones emulated that same shape. Air lines were grease-gun hoses, heck, the original aluminum 10-round tubes were meant for cigars.
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In the late 80s, we were all guilty of "shimming up the springs" to gain an advantage. The local field had a test..... he would shoot the gun, point blank, at shop goggles, and if it busted the lens, he called it too spicy. Not scientific.... but the resulting imagery was very effective.Our "Chrono" was a rock on a log ... Only for those who had fancy gun with velocity adjustment
I think around 89, the field got one of those early chronos. The sunlight style that had 2 cardboard plates, each with a small hole that you had to shoot through. and we would always hit those plates, and screw it up, and the field owner would get so pissed. The limit for the field was 330 for 68, and up to 400 for 62. Absolutely insane. I had scars for years. YEARS. Freight trains were terrifying for the lead player.
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