I have received three kayfun V4 Clones. One by ToBeCo for $30.00, which is perfect in every way except maybe for some oil, some dirt, few metal shavings/chips and bad drip tip O-Rings. Which is easily fixed. It has Silver plated Beryllium Copper spring and 510 Center Pin. The other two: One from fasttech and one from GearBest for $18.00 each are complete waste of money. Even though, they are from two different sources, they both appear to be identical.
Yikes, there's NO WAY I'd ever buy an atty with THAT many loose parts. Wow, really? 40 pieces?

