ZCI V3 Stainless Steel Ball Bearing Spring Guide

I got one of these to replace the stock spring guide in my JG g36c. Let me just say that it worked out amazingly. My only con is that the end of the spring guide unscrews real easily. This can be very bad because it could fall into the gears. Just dab some super glue on it though and screw it back on and your good; did it to mine and the end stays perfectly.