The SU - 16A has an 18.4 in ( 470 mm ) barrel .
The SU - 16A comes with a windage - adjustable hooded light - gathering blade front sight mounted near the muzzle .
The SU - 16A has an 18.4 in ( 470 mm ) barrel and comes with a windage - adjustable hooded light - gathering blade front sight mounted near the muzzle .