This is my KWA PTP MARK III. It has been my side arm for almost the last year. Thankfully I have only gotten a handful of kills with it. I love this GBB! It is very solidly made and I have not ever had an issue with it. I use propane and and my own silicone to the propellent. My only complaint about this pistol is the magazine release is very easy to depress. I have to use a SERPA holster or some other type of 'hard' holster as a 'soft' holsters allow the magazine to be dropped. I haven't done a lot to this pistol. I removed the orange tip as it is legal here in GA and I removed the ambidextrous safety because of personal preference. This was a great gun for $165 and I would highly suggest it to anyone else!