Well the G&P M4 Magpul Carbine I was trying to sell died. So its being taken off the market. I new there was a problem with the wiring but when I took apart I find out that the tigger has some nasty carbon build up. So I took everything out of it and cleaned them up. I read some where that there was a compound that can help prevent this in the future. You rub it on the contacts and it helps them resist carbon though i cannot find the thread with it. After I clean up the contacts I plan on putting it back together and eventually clean up everything and polish it and get the compression good once I have more time. I do have 2 questions though. What is this? I found it on my desk before I opened up the gearbox though it may just be some random piece from some thing else I am not sure.