After having a few problems with my Classic Army SCAR-H and finding virtually nothing on-line for any sort of help with the SCAR-H, more specifically the Classic Army (CA) SCAR-H, I had some help from a friend and I put together a How to/disassembly guide and the solution to some problems that I've come across.
Note:
This guide will NOT cover taking apart the mechbox as I am not that experienced but I will cover everything else.
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Step #0 - Pre-disassembly
Remove magazine, make sure no BB's are in hop-up unit, and remove the stock of the gun.
Step #1
Remove screws nearest the barrel tip
Step #2
Remove the screw on the bottom of the handrail nearest the hop-up unit and now the outer barrel and handrail will slide off, revealing the inner barrel.
It should look like this...
Step #3
Remove the plastic covers in the leftmost position and second most right position to reveal the screws and unscrew them to pull the side rail off, repeat for both sides.
After removing the covers you will see this...
Step #4
In order to remove the hop-up unit we must knock out the two receiver pins. Once we have done this the hop-up and inner barrel will easily slide out.
Once the inner barrel is removed it will look like this...
Step #5
Next we want to remove the slide, in order to do this we must unscrew the screws that are holding the plates on, that are located above the front most receiver pin we just took out, remove on both sides.
A removed plate will look like this...
Step #6
Now in order to remove the slide we must unscrew the handle located just under the mounting rail and above the plates we just removed. Once this is done the slide and will easily come out.
Step #7
Now we will be removing the lower receiver. In order to do this it's best to open up the stock and feed your battery wire through, to avoid damaging it. Carefully feed the battery wire through each hole and slide the lower receiver free of the upper.
The lower receiver separated will look like this...
Step #8
Next we need to remove the pistol grip, we do this by unscrewing the screws at the bottom of the grip. After the 2 screws are removed we must take the connectors off of the motor and then remove the motor. Once the motor is out we must unscrew the 2 screws in the grip left and then feed the battery connector wires through the holes and the grip will come off.
Step #9
In order to get the mechbox free of the lower receiver we must first remove the pin holding it in between the fire selector switch and magazine release buttons. After the pin is out, it's a bit tricky to pry out the mechbox, but the best approach is to use two screwdrivers to pry each side of the receiver and wiggle the mechbox, it will come free eventually.
The mechbox shell separated will look like this...
