The oldest Riffe I seen is only like 5 years old. U probably can track it down from the serial umber under the gun near the butt. As for lamination or not, Uncle Sven will be the man to answer...I have not seen a non laminate Riffe. Riffe was introduced late in my country, thus my Riffe knowledge is not more than 5 years.
The difference I know is as follows :
01. New mid handle I think come with soft pistol grip, I mean it has rubber coating for better grip.
02. The shooting line release where it follows the trigger, the newer ones has a spring so it always hits home ready to cock the shaft in. In older u need to hold the gun muzzle upright ( common position anyway ) or pull that small release towards the butt or else the shaft won't engage.
Gee, what s short post I just made...:t