Original sentence: Accuracy: The AK47 is generally considered a less accurate rifle, as the loose tolerances that increase reliability and decrease manufacturing costs have an impact on accuracy.Firing mode: The AK-47 and M16A1 both have a switch allowing the operator to select semi-automatic or fully-automatic mode.Gas from the barrel is used to cycle the action but lacks the piston, so the gas works directly upon the bolt carrier.However the modern variants of the M16 are considered by many to be a great improvement over the original.However the use of cleaner powders in the ammunition and the replacement of some components fixed many of the reliability issues.Part of the problem was that the M16 was perhaps too optimistically billed as self-cleaning and cleaning kits were not issued.The AK-47's is located on the right side, a large lever that was pushed up or down.The gas tube is fairly large and is visible above the barrel.The original M16 of the Vietnam era fared poorly in the humid, dirty environment of the Vietnamese jungle, and would also face problems in the sandy environments of the Middle East.The relatively heavier recoil of the 7.62x39 cartridge also aggravate this
Edited sentence: Accuracy: The AK47 is not an accurate rifle, the loose tolerances that increase reliability and decrease manufacturing costs also decrease accuracy, and the relatively heavier recoil of the 7.62x39 cartridge only aggravate this.But it lacks the piston, the gas works directly upon the bolt carrier.Firing mode: The AK-47 and M16A1 both have a switch allowing the operator to select whether he wishes to fire in semi-automatic or fully-automatic mode.Like the AK-47, gas from the barrel is used to cycle the action.Part of the problem was that the M16 was billed as self-cleaning and cleaning kits were not issued.The AK-47's was located on the right side, a large lever that was pushed up or down.The M16 of the Vietnam era was not adequate for the humid, dirty jungle environment of the Vietnamese jungle, and it would not be suited for the sandy environments of the middle-east, however the use of cleaner powders in the ammunition and the replacement of some components fixed most of the reliability issues.The gas tube was fairly large and is visible above the barrel.The modern M16 is considered by many to be a great improvement over the original