Neshek
Aluminum
- Joined
- Mar 17, 2010
- Location
- Wimberley, TX
This is almost Off Topic since I don't plan on having to do this, but I am really curious. I was reading in an AR-15 book (may have been The Competitive AR-15) about where the hole should be in the barrel for the gas port. The author said it should be in a groove between the lands. Of course this is possible if the timing has not been selected yet on the barrel.
First question: Is this true? Do barrel manufacturers do this and if so how do they line up the barrel to drill from the outside? Or, as a home shop machinist am I clueless and the answer is CNC?
Second question: If I were building the barrel I think I would get the timing right for the barrel extension first and then drill the gas port hole. Of course if I did that I couldn't guarantee the hole goes in a groove of the rifling.
So what's the answer?
Thanks in advance,
-Art Kauffman
First question: Is this true? Do barrel manufacturers do this and if so how do they line up the barrel to drill from the outside? Or, as a home shop machinist am I clueless and the answer is CNC?
Second question: If I were building the barrel I think I would get the timing right for the barrel extension first and then drill the gas port hole. Of course if I did that I couldn't guarantee the hole goes in a groove of the rifling.
So what's the answer?
Thanks in advance,
-Art Kauffman