Gas port question
 

Thanks to tp555 I now have a Daewoo DR200 upper barreled in 300
Whisper. My only question now is what size to drill the gas port in
the barrel?

This thing has been SBR'd and will ultimately look like this:

http://www.gunbroker.com/Auction/Vie...Item=123497181

I guess it could oversize it some and still be okay since the Woo has
an adjustable gas system...that little plug under the front sight?
Right?

Thanks,
Keith