Sorry if this all has been hashed out but I wasn't aware of the DSA gas plug designed for suppressors until just recently. It's a modified gas plug that uses
ported bolts to bleed extra gas off (Like Schuster nuts for the Garand). I was shooting suppressed with the regular gas plug, but it was pretty violent and beats things up.
Using the normal gas plug the rifle ejects brass violently at 2 o'clock at least 30' or more when suppressed. Brass was striking that grass covered berm hard a foot or two up, with the gas regulator wide open. With the suppressor plug it was throwing the brass 10'-12' at 4 o'clock (just past the next bench stool) Quite reasonable using NATO ball. I'll try the small port bolt next. Worked well in semi and full auto. Only thing that sucks is the gas plug is dedicated so to shoot non-suppressed you have to switch the plugs back to your standard plug. And mine did not come with the handy "L" lever, grrrr. Suppressor is a Saker and rifle is select fire FN-FAL paratrooper. I would like them to design a new plug that has normal and suppressed setting, and has the "L" lever.
Belgium FN FN-LAR select fire Paratrooper, original configuration. Silencer Co Saker suppressor using muzzle brake QD mount.