That, my friend, is the bastard child of an FN Police Tactical Shotgun (which is a clone of the Winchester 1300), and a Remington 700 Rifle. You could make it if you had both those guns, a hacksaw, some plastic for the grip and maybe some tape, superglue or other adhesive, and then, it might not work. Otherwise, it only exists as an airsoft gun.
FN Police Tactical Image:
http://www.lesalesusa.com/fn_sg_tactical.gif
Remington 700 Image:
http://www.imfdb.org/images/8/85/RemingtonPSS700.jpg