I bought the custom CMMG mid-length medcon upper with Vltor CASV handguard and A.R.M.S. folding sight block, vortex flash hider on 9/6/08.
It is a beautiful upper. I took it to the range for the first time today and the bolt doesn't cycle at all, meaning I have to charge the handle for each shot. It seems that there's a ton of carbon fouling on the A.R.M.S. block.
What should I do? Can I bring it in?
It is a beautiful upper. I took it to the range for the first time today and the bolt doesn't cycle at all, meaning I have to charge the handle for each shot. It seems that there's a ton of carbon fouling on the A.R.M.S. block.
What should I do? Can I bring it in?

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