Has it been in the engine long? There looks to be some squish working for you but cylinder pressures/ detonation have wrecked the ring land. How did it happen? I take it it's a stock AE item but with cut-outs put in.
certainly a pic post rebuild worn cam and lack of maintenance to the fuel injectors, apparantly when i took the injectors in for a re-furb they told me the car would be running very lean. a good thrash when in this condition and i am pistandbroke.