Quote Originally Posted by Graves View Post
So is there an issue with running a rifle length gas system on a 16" bbl?
Depends who you ask. Those that have them say they run just fine. Others say they can be finicky about cycling, especially with different ammunition due to the lack of dwell time- the time the bullet remains in the barrel after it passes the gas port. The distance between the gas port and the end of the barrel is the same on a rifle length gas system with a 20" barrel, a mid length gas system with a 16" barrel, and a carbine length gas system with a 14.5" barrel. A 16" barrel with a carbine length gas system actually has a slightly longer dwell time than the other configurations I mentioned above and seem to run dirtier (for me) and tend to accelerate wear on my gas rings. That's why I want the mid length gas system.