05-20-2011, 03:21 AM
turnbull Wrote:I just checked out my upper and thats exactly whats wrong with mine. How do i fix that?
While many say to Dremel M4 ramps, thats only recommended if it's the barrel ramps that need to be fixed. And you can ruin the barrel very easily. If it's the upper receiver that's not M4, you are cutting through the hardened surface on the upper receiver when dremeling. You really need to use a proper M4 receiver.
Personally, I'd swap the barrel or upper receiver as needed. New upper receiver is not much, and your old one will have some resale value. 15 minutes to swap for someone who has the tools and know how.