I have two 6.5 CMs, one with the APA LB, the other with the Heathen. I believe I prefer the Heathen, but either are fine. If I bought another, it would be the Heathen, or I might try the 419 Hellfire. If it is as effective as the others, it would probably be the winner due to ease of installation. The Heathen has the edge over the APA because it is tool-less.