Quote Originally Posted by Eurodriver View Post
I bought a 16" DD barrel and cut it to 10.3" without adjusting the gas port. Pinned the gas block and it runs like butter suppressed.

Even suppressing a "good" SBR with a "correct" gas port is going to over gas the weapon.
Exactly. DD uses a .058'' gas port on their 16.1'' guns, if I remember right.

IMO .058'' is much closer to ideal (.062'') on an SBR than .071'' is.