Regret to admit that my front sight is lose, after only about 2 boxes of factory .357's. I did try and fasten it a bit, the only problem is, that I don't have the exact size of the unbrako needed. I think the problem is that the size vary from the ones you use in the states, and the ones we use here. Probably yours are measured in inches, and ours in centimeters. Does anybody know the size used to fasten the front sight???
And... why was this not fastened properly from factory??