We transferred some adjustments from the vision chassis to the pro chassis, improved them, and added a lot of new adjustability features. The adjustable buttstock has been improved both in stiffness and feel. The forend is even longer with more M-loks and our new V-Løk attachment system, and has the possibility to add 1kgs/2lbs of internal weights. And last but not least, the magazine well features height and length adjustment to get the perfect magazine fit.  See more at gcprifleco.com