Hi guys so I’m looking to turn my .308 rifle into a sort of SR25 design. At the moment it has a crane m4 stock on but I am looking to change it over to a sort of m16/SR25 type stock. I’ve watched some videos online on how to change. Stock but I’m not sure the m16 stock requires a buffer tube. Does anyone have any advice or videos they could share on how to swap an m4 stock to an m16/SR25 stock