I bought a Sig 516 ( Gunbroker ) in November in flat dark earth. Upon first field strip and inspection I found a half inch scratch in the rail system and after removing the rails, I found shavings from where the rail flanges had been chewed up. Also found a small washer loose in the rail system that they told me was used for the rail flanges. Called Sig and sent them pix. They agreed this issue was on them and they sent me out new rails right away. However, they were black, not fde. Called back, they said they're not sure how this happened and fde rails were on the way. That was Dec 5 and still no rails. I've emailed a few times since then but only response is the fde will take some time. Feels like I should have them by now and getting mad but I might just be impatient. At no time were they disrespectful or unpleasant. What do you guys think? Any stories from sig service?