Tyberius,
Can you show how you cut down the air soft submachine guns to fit your robot chassis?
Regards,
TCIII
Its built around Jon Hylands’ Microraptor, both he and I have built AX-12 based smaller versions of this same leg design and it works rather well. We’ve both had it walking and walking well.
It does not use a standard humanoid walking gait, hence the difference in COG placement and wider stance. Feet are actually 5" wide and 7" long, they just appear small due to the perspective. Proportionally they are just about the same size as the bioloid feet. Also, the way its standing in the pictures isn’t a proper stance, the legs are much more upright while walking.
This type of setup would not work well in say, RoboOne style competitions however. Its not intended to take physical hits and relies on a higher COG to walk well.
It was really rather simple, I took them apart to split them in two, removed the innards and cut off the bottom with a bandsaw.
Just for show you may want to get a laser pointer for each airsoft so it can be energized prior to shooting to point the intended target. One can get the small laser pointers at Walmart for $2.49 each.
I’ve got some TTL lasers from Sparkfun I intend on mounting, same concept just very small and flat.
A bit more progress:
Onboard Gumstix running Buildroot linux is online here, standing under its own power.
OMG! This thing is cool! I love the look of the leg folded up, it looks brutally tough. The brackets are incredible, how or who made them? What did you use to design these parts? Alibre?
<-- What he said! Very impressive project and I’ll always be interested in more information and pics when available. Quite inspiring.
I designed all of the brackets in Autodesk Inventor and had them machined at Big Blue Saw (bigbluesaw.com). They used a water jet cnc and brake to cut and bend.
I’m saving the majority of the info for a series of articles I’m writing on the robot for SERVO. Check the upcoming June issue 
I was thinking you could put RC shocks between the joints to help the servos with the weight of the torso assembly. The same way you used an RC shock for your J5 project. This would improve the aesthetics while help the servos a bit. Just a thought.
I considered it but didn’t go that route for two reasons. First, it would limit movement on each joint. Second, these servos are pulling about 1050 oz-in of torque @ 21v, I doubt they need much help.
I realize that standard RC shocks would have a limited stroke, but if you created your own spring dampener assembly, it could have any range of movement you desire. With the length of the legs I would think there would be a lot of bouncing going on.
Those are very strong servos! 
Tyberius,
What version of the aluminum “C” servo brackets did you use to hold the soft air BB guns: The standard or the large, short or long?
Regards,
TCIII
Standard, long. Bent via brake.
Tyberius,
Thanks for the quick response and info. Much appreciated.
I am building a 4WD rover that will have twin Air Soft BB guns mounted on a turret that can move in AZ and EL. We have a lot of rabid sunks in North Texas and I will use the rover to drive them off without having to kill them.
Regards,
TCIII
Hahaha TCIII,
your just going to ■■■■ them off and they will literally “Skunk” your robot and your going to have a huge mess to clean up.
Id emm wrap that robot in a big glad bag if i were you, your going to literally scare the stink out of em!
on a side note, if you do that, I so want a video.
–Aaron
Stay tuned Tyberius I have a robot I made that will literally crush yours 
it might actually survive a category 5 hurricane! be warned.
LikWidChz,
The idea is to hit them with the BBs far enough away that they cannot spray the rover. Also, the rover is equipped with a flame thrower.
Regards,
TCIII
Gulp!
Jim,
You would not believe how many videos and articles are on the web concerning building your own flame thrower some of which are military quality!
The best of “how to” make your own flame thrower was on UTube. The guy had built a backpack set up that could shoot a stream of jellied gasoline thirty feet much like the flame throwers used in WWII.
My rover scale flame thrower is rather modest in size. It can propel an 1/8 dia stream of concentrated windshield washer fluid, which is very flammable, about 10 feet using 100 lb compressed air.
Regards,
TCIII
Wouldn’t you be worried about all that expensive stuff blowing up?