Thank you guys. I was thinking about changing the gas port bushing to reduce recoil and looking for my brass. Also, I think it does have the quicker rate of twist. Looks like I am good to go. I appreciate the help.
Speaking of the old Q3131, I have a box sitting on my desk. I believe it is of 89 production and is stamped WCC. If I remember correctly, this stuff was pretty expensive at the time , $4.00-5.00. However, it was too many years ago for me to remember with certainty.