>because Sambo and Mohammad wouldn't be able to maintain an M4 They do require semi-regular disassembly and cleaning. You also can't use the M4 stock as a club as the buffer extension would break. So there are rules on how to operate them. >There's a vid with a Russian airfield vs US airfield, where the Americans clean and clear all areas so there's no loose debris ingestion risk, the Russians don't care about minor details like that I think this might be more about how either country sources their aircraft. Americans are probably more concerned about aircraft longevity because they are spending shitloads of money on them. Turbines generally don't do well with foreign objects or debris. I bet the Russians are probably getting their aircraft for closer to the actual parts value instead of getting bent over like the Americans.