Peening on toggle question

[maxmanta]

My pet Luger has begun to develop a slight amount of peening on the toggle. It is hard to describe and I do not have a digital camera handy, but I will try my best.

It is occurring right at top of the hinge of the bolt carrier and the first part of the "leg." It is being caused by leg impacting with the bolt carrier. I don't know if this is caused by shooting it (I have 200 rounds so far through her) or by my hinging the joint upwards when I insert the toggle assembly into the upper receiver.

Is this sort of wear normal? I'm still a relatively new Luger owner and I still have alot to learn.

Thanks!