Introducing the Spring M40 Submachine Gun Airsoft Gun. Utilized by the German’s in World War II now you’ll own the airsoft version of this incredible submachine gun. The M40 includes a folding stock with a purpose to swing underneath the gun taking into consideration a more compact gun. The hop-up will allow the BBs to commute further with more accuracy and the R.I.S. positioned above the gun will can help you customize the gun with any attachment. Get the Spring M40 Submachine Gun Airsoft Gun and sign up for the action!