There's two different versions of the first generation strikefire there's the low mount version and then the extra high mount 1/3 co witness, i run the 1/3 on my CQ-A and I can see the front sight post, but the dot's still visible above it. If you already have the low mount version, you can always look at just getting a cantilever mount for it the tube size is 30mm. Vortex makes a cantilever mount specifically for the strikefire those can be had for about $70 on amazon but if you shop around, I'm sure you can find a mount for much less.