I do not have a spanner wrench nor the skills to work on someone elses AR. I was at the AR build party trying to learn a few things but I ended up out on the range for a couple of hours. They should be having another sometime soon. I am still waiting on a lower from a group buy to show up. I did grab a card of a guy that was there and had all the tools and knowledge to help you out if you need. I will PM info if you request it. VUPDBLUE may be able to help you, he is not from Anderson (Indy) but knows his AR's.