The only thing could be the price, but its gone down.
Ive used a RACE frame on my cocker for almost 2 years now and i cant imagine shooting anything else. these frames rip, that's all there is to say about it. Customization is another key factor in these guns. unlike an eblade, you time the gun according to your specific marker, down to how long the ram stays open and how fast the balls fall into the chamber. there is no limit to how customizable you can get with these frames.
I will never own an autococker that doesn't have one of these on it. it is by far the best electro conversion kit for the autococker.
The only difference between the E-Blade timing parameters and the Racegun timing parameters, is that the E-Blade groups the ram opening time and bolt open time together, the Racegun keeps them separate. Other than that, all the timing parameters are the same.