09-25-2019, 07:45 PM
(This post was last modified: 09-28-2019, 10:10 PM by Mad Charlie.)
The pin might make it a little hard to lap the extension...
Most uppers are forged. There are some "billet" uppers. I have no experience with billet, all four of my uppers have needed lapping.
Most uppers are forged. There are some "billet" uppers. I have no experience with billet, all four of my uppers have needed lapping.

