Was doing an experiment with this piston gun. I know some Carbine schools have famously gone much further w/o cleaning but this is as far I wanted to take it. Also it's not just "how far can I take it and it still work" but also "It being a Piston, I am curious how dirty or not dirty it will be after all those rounds". Cleaned it today at approx 1030 rounds. There was not a single malfunction during those 1030 rounds. At that it didnt look clean but it wasnt filthy either: - Lot of oil from my original heavy oiling (for storage) still left over too. - Barrel was quite dirty as expected - Used my chamber stars for the first time. Not sure how to do it so I improvised ( check last pic) Nowhere was there caked-on Carbon to work on. All the dirt you see even in pics 3 and 4 was spray and wipe, and mos tof it seemed to be a mix of lube and some carbon or dirt but nothing caked on by heat.