Most will do what you want just fine, even a Norinco. Some are put together really nice, look and feel high quality and shoot well (RRA for example) but not up to scratch for serious use (serious meaning shooting at people who shoot back at you). Some are built as close as possible to "mil spec", which generally means good to go for "serious" use, and will do everything else fine as well. Only time I've seen AR's choking is when people fuck around with the gas system, use shitty mags and ammo, or an improperly installed gas key, lack of lube etc. Not rocket science to keep one running.
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