My wife is about to strangle me. Laying here on the couch lighting up the living room bouncing it off the ceiling. Apparently she’s a selective flashaholic who is not so enthused in the mornings.
That driver is direct drive, passes through two FETs and that is it. unregated, which means you could bump this a bit higher just by modding the tail springs. Not sure how close to being over driven it is already, but might be interesting. Very simple driver.
Each FET appears to drive two emitters in parallel. There is a third one unused, probably intended for a triple or 6x.
Edit: Looking closer, it appears the FETs are in parallel and all four emitters are parallel as well.
Edit2: After further deliberation, and based on a past experience, I would exercise caution when improving the current path. Until we know how much current it draws in stock form, the springs and emitter wires may be saving the emitters.
+1 Thanks Relic… Not sure how prudent boosting would be. Just like its little brother. It warms up quickly.
Any cheap source for this?
They are so new. The only place I have found them is Ebay. Just type in Skyray Kung M4
Thats the problem…
Whenever I search for lights on ebay.com, I find absolutely nothing although you post a link of an item and it definitely has to be there.
Same when I copy the title of the item and search for that…
If I click on “other items of this seller” the light is not listet there.
I know that there are those items, but I don’t find them.
Maybe because I’m in Germany?
That’s weird… Wouldnt have any idea.
Mhh brotherhuang only sells the golden version…
There are black and grey ones too from other sellers…
Wonder if they are the same brightness…
This will get you to the gold ones…… Cut & paste into ebay…. 6500Lm 4x CREE XM-L XML T6 LED Camping Flashlight Torch 4x 18650 Light 40W M4
No results…
I tried it by google and searched for “evay skyray m4”.
That worked.
It get to a page where some offers are listed including the golden Kungs and some grey and black ones.
Unfortunately the black ones will not be shipped to Germany.
I will prolly buy one of them as well
Heres the black one…will be shipped to germany…
The black ones look better than the golden one.
But as we saw on fasttech, the golden ones may be better than the blacks…
I won a bid for under $40…. I’m a cheap b*stard. LOL
They have the black Krug for $57 on ebay with batteries and 2 chargers.
I have a Gold King so it looks to be just a click of the button 
Forgot the link for the black one above:
http://www.ebay.com/itm/SKYRAY-6500-Lumens-4x-CREE-XM-L-T6-LED-Flashlight-Torch-4x-18650-Light-M4-Black-/281117122942
Look @ Toppel helping someone spend their money!!! Reminds me of…… ME…. 
Haha!
Mhh bad thing…
Buy the golden one from brotherhuang means gold colour and the safety, that its a good one
Bey the black one means cooler look and the risk, that its not the same brightness…
Dont know what to do xD
By looking at the beamshots. It looks like Kung has larger spill, and larger hotspot. In total more light.
Throw is quite equal, the Kung does not seem to throw further.
Agreed, I kinda expected that. Being that they are basically performing from the same platform. +1 emitter But then again… I really didnt have an area to test distance.