Complex sentence: Some designs will reset the cam position, so the next burst will fire a full number of rounds, while others, like that on the M16A2 rifle, will fire the remaining rounds in the interrupted burst and then stop.
Split into simpler sentences: Some designs will terminate the burst if the trigger is released before the burst is complete, while others will reset the cam position, so the next burst will fire a full number of rounds. Other designs, like that on the M16A2 rifle, will fire the remaining rounds in the interrupted burst and then stop.