C joint

The C joint is an accessory mounting system using a rather simple 3mm bar and c-shaped clip. First used in the Revenge of the Fallen/N.E.S.T. Global Alliance series on a few items in 2009, by the time of 2010's gold-packaging Transformers line and Generations, the C joint has seen much more widespread use.
The system has been given the internal nickname "Miyake joint" by TakaraTomy employees, named after its designer Miyake Tomoya<ref>http://www.tfw2005.com/boards/transformers-news-rumors/359804-united-reveal-shield-jazz-development-secret-story.html</ref>, who first used it on the Revenge of the Fallen Recon Ironhide toy.
Toys with C joints
Revenge of the Fallen/N.E.S.T. Global Alliance
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- Brawn (bars only)
- Brakedown (bars only - bottom of his hands)
- Recon Ironhide
- Scattorshot (bars only - his guns)
- Skystalker
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Transformers (2010)
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- Breacher
- Fallback (bars only)
- Firetrap (bars only - his guns)
- Flak (bars only - his guns)
- Solar Storm Grappel (bars only)
- Hailstorm / Mindset (bars only)
- Hubcap (bars only - his exhaust pipes)
- Special Ops Jazz
- Lugnut (bars only)
- Perceptor (bars only)
- Oil Pan (bars only)
- Optimus Prime (bars only)
- Demolitions Rumble
- Sea Spray (bars only - his rungs)
- Sidearm Sideswipe (bars only)
- Sunspot
- Terradive
- Tomahawk (Four bars- two on his tail and the guns on his wings)
- Turbo Tracks
- Windcharger (bars only)
- Wreck-Gar
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Generations
Transformers 2010
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- Darkmount / Skullgrin
- Sergeant Kup
- Scourge
- Thunderwing / Sky Shadow (bars only - his guns)
- Wheeljack
- Junkheap
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Titans Return
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United
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Dark of the Moon
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- Bumblebee (bars only - his arms)
- Crankcase (bars only - his upper arms/door panels)
- Laserbeak (bars only - guns)
- Megatron (bars only - hips/doors, exhaust pipes, rung)
- Deluxe class Optimus Prime (bars only)
- Jetwing Optimus Prime (Jetwing jet pack and Gatling Cannons only)
- Ratchet (bars only - arms)
- Roadbuster (bars only - his forearms and missile pods)
- Shockwave (bars only)
- Space Case
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Human Alliance
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- Backfire
- Drag Strip
- Icepick
- Reverb
- Sandstorm/Half-Track
- Tailpipe (bars only - on his legs/motorcycle back)
- Thunderhead/Crosshairs
- Whirl
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Cyberverse

- All Cyberverse figures have at least one hand that is a clip. All Cyberverse weapon platforms/playsets have the usual smattering of clips and bars. They also all have a uniform placement of clips and bars on the sides of one of their modes, allowing them to connect to one another.
The Last Knight
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- Sqweeks (Bars only, all 4 handlebars are compatible)
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Notes
- LEGO has long made use of 3mm bars and clips as well. In practice, LEGO's standard is just the slightest bit larger than Hasbro's, so LEGO clips with even a little wear will only loosely grip C joint bars. Still, LEGO minifigures can cling to your 3mm-bar-equipped Transformers, and their vehicles (assuming they incorporate the appropriate parts) can mount 3mm clip weapons.
- Naturally, this means that similar-construction Kre-O parts should work as well.
- While C joints per se were not developed until the Revenge of the Fallen toyline, many previously made toys have similarly sized bars that can be used to attach C joint weaponry. At least one example dates to the earliest days of the franchise. The Action Master weapons' handles are all C joint-compatible pegs, though the general lack of clips on the robots themselves means this compatibility has somewhat limited practical application for modern figures. Still, you could give the Action Master partners some extra weaponry.
- ...but be careful about it. As with 5mm posts, a bar that appears to be 3mm may not quite be 3mm. TFWiki.net will not be held responsible if you break the clips on your weapons trying to force them onto bars that are too big.
- Because clips are attached to the right side of the Ark, it is technically the largest C-joint accessory yet made.
References
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