I don't see why it would be. But you'd have to make doubly-sure that it was even so that there is nothing for the paint to catch on. Also, be careful about doing something that would prevent your disassembly of the cyclone.

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A-5 / E-Grip (WAS) / Aftermarket Ratchet / CAR Stock / 12" PPS Brass Barrel / Remote Line / 68/4500 Carbon Fiber HPA / Polished Internals / Maddmann Spring Kit
(See my profile for second A5 Setup)

The future holds:
X7 Vented Cylinders for both my A-5's