i just received a winchester 190 22.rifle from a buddy. the receiver has a chip broken out of it about the size of my pinky nail....clearly not safe to shoot. is there any way i can repair this or should i just buy a new receiver (if so where can i get one). also i have read that this specific rifle is a huge pain in the A$$ to clean and work on. does anybody know if this is true or have one they have cleaned?