well we all know the guy on youtube (jdeluisa) having all the jamming issues. i myself am starting to experience the same issue only after 1000 rounds. i was just doing some failure drill today to get some rounds down range and had this issue. i only shot 150 rounds and i did let it cool off. but when i kinda run it "hot" it started jammin. but when i just sit on the bench shootin casually i didnt have issues. i know bm changed the design of the gas regulator which is prolly the problem. well not really a problem just a way for the freedom corp to sell a few thousand gas regulators to make money. im guessing they changed this and didnt test it. theres no way they didnt "find this issue in testing" cause in less than 2 mags of doin drills it started jammin bad. unless they fired one shot and called it good. and when this thing jams it jams! double feed every time. even with a simple stove pipe. it still starts to feed a round so if you tap and rack it double feeds. not only that the casing usually sticks in the chamber so you have to physically pull it out. yall should do some drills with your acr and see what happens. i dont know about everyone else but we have piss pounded our m16s and they operate just fine.