I ended up calling the company I am getting it from. He knew right away that the SAR-1 took the single hook... I was wondering what the difference was.
I didn't buy it from Tapco, but I did get the G2 parts just from a different distributor. I did it that way, because he was the same price, and has flat rate shipping. So it was overall cheaper to get the 4 things from him and pay his $8 shipping for all 4.