Well I have a couple of the Knights CQBs that I've been tearing apart and rebuilding solely for the rail, stock, and handgrip. My bro, who is a gun tech, tore apart the gearbox and found that all gears inside are all cyma. The motor wasn't too bad, nor the other internals for a new player. But the externals of the gun are pretty decent. The battery replacement in the crane stock is pretty quick.
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