Well here are some numbers on the weight of the Tristar C-100 compared to my old Bersa.
Tristar - 31.2 oz.
Bersa - 23 oz.
These numbers come from Academy Sports. Now I thought the Tristar felt lighter.... apparently I was wrong. I haven't actually weighted them. But I carried the Tristar today while out getting some things from Walmart and Publix and it carried fine inside the waist.
Also Academy advertises the Tristar with two 12 round magazines but I have two 15 round magazines. Good deal! I haven't found any numbers on the width of the gun and I haven't measured it either but it seems more narrow than the Bersa.
Below are some pictures of the C-100. One side and then the other but also some pictures of the hammer in all three positions.