2008 ap2 vs rzrx tour

I have been playing rzr x tours, I decided to buy some 2008 ap2s online. They looked great, but when I took them to the range I lost a considerable amount of distance. The shafts in them are px 5.5, the shafts in my rzrs are dg s300. Is it a shaft fix or is the technology not there?

What technology would you think is missing?

The original AP2 irons have the technology that has made them  the number one model played on tour since 2007.  You are comparing apples to oranges.  The AP2 irons were made for feel and playability, not distance.  They have less bounce and offset, more loft and a different shaft.