16" Barrel, Synthetic Stock, Extended Rail, Ambidextrous QD, Foldable Charging Handle, Matte Finish, Green, 30 Rounds.The AUG A3 M2 has a length of just 28.15 inches with a heavy barrel of 16 inches. It utilizes a short-stroke gas piston operation, allowing the rifle to run cleanly by venting out gas from the front of the rifle and a dual adjustment setting ensures flawless operation even with poor quality ammunition and in adverse conditions.