Mine is old style front with circular ears, also referred to as AK style. Using these with rear aperture sight creates confusing sight picture. This is a training issue though, and is a relatively soft point; moreover, AR-style post front Troy sight is available now.
The issue I had real problem with was weak aperture detent on rear sight. The aperture selector is kept in position by a pin (I assume, spring-loaded). I think the spring should be stronger, as my aperture selector got knocked out of position during weapons manipulations such as transitions etc. Bringing the weapon up and seeing the rear sight in position between large and small apertures is not a good thing. I did want to send my sight to Troy, but, after examining several rear Troy sights, I didn't find any difference in how much effort it took to move the aperture out of positions.

