Thanks folks, especially Kaintuk. They are off center, way too small to be for pinning the trigger guard, and in the wrong place too. I may use two of the casting sprues to pin the guard unless I decide to screw it in place. If I do, I will file them thinner first. If they are too hard to file, I will use screws. I know it does not look exactly like a hand forged guard, but I am not paying over $200 for a nice forged guard and butt plate, nor am I going to spend years learning how to make one myself. It is not going to be that kind of rifle.