None, really. Only guy that I know that makes these things.
Smart Parts Ion
14 inch CP 2 piece barrel
Smart Parts Q-Lock
Lucky Stage 1 Bolt
Lucky Stage 2 Firing Chamber
Lukcy Stage 3 Rear Donut
4 set screws
None that I know of
I bought it the 2nd or 3rd day these things came out. I know lucky, and I know that this stuff goes quick. So I bought the Donut and the trigger pin together, saving on shipping. They came within a week, not bad for across the country. Props to Lucky and UPS.
The install was easy enough, take off the old one (difficult if you don't have a C-Clip remover or alot of patience. Or, if you haven't done had to remove it before.) Personally, I hate C-Clips. I think they're a huge pain in the butt. So the idea of having 4 set screws is WONDERFUL. Just put the donut on, use your allen wrench that you already have in your Ion kit, and away you go.
So, past that, perfomance. There might be a small increase in performance, but its hard to tell right now, with the capped board. With all my ups, I am currently running a 15 dwell and a 120 PSI, 285 fps. Way better than stock.
As far as look are concerned, the anno job is amazing. Awesome color. I got blue. I also chopped off the back of my body so you can see the firing chamber and donut. I also learned that this has so air-flow benefits as well. Try it and you'll see what I mean.
Great product. It looks awesome, and overall will help your marker perform its best. I can't wait to see the rest of Lucky's products.