My main concern after seeing this picture would be how badly the compensator is impacting the guide rod. This would be even more of a concern if I happened to be using any of the steel guide rods available for these pistols.
I'd also be curious to know if this compensator slows the rearward travel of the slide down to the point where it starts negatively impacting reliability.

I'd also be curious to know if this compensator slows the rearward travel of the slide down to the point where it starts negatively impacting reliability.