I just purchased my first gun with an alloy frame. Its a CZ 2075. I like the gun, it shoots and conceals well. Immediately after getting the gun home, I cleaned it and lubed it really well. Then i took it out and shot about 200 rounds through it. I then took it apart to clean it, and i noticed that on both sides of the rail, in the same general area, there was some bad wear. The paint had been scraped off and some metal was also removed. There were basically small chunks coming out of the frame. I could see little flakes of aluminum near the rear of the frame. Is it normal for an alloy framed gun to do this? I've never had one and dont really know if this is to be expected.