You might have some carbon buildup internally, and may need to open the gas block another click or two.
Also, different ammo will operate the system differently. If you tune the weapon to run smoothly with a slow-burning powder, you will likely experience short-stroking with faster-burning propellents.
Changing the BCG, buffer, and / or buffer spring might also necessitate re-tuning the system for proper function.
What is your barrel length and gas system length, and what ammo are you using?
Also, different ammo will operate the system differently. If you tune the weapon to run smoothly with a slow-burning powder, you will likely experience short-stroking with faster-burning propellents.
Changing the BCG, buffer, and / or buffer spring might also necessitate re-tuning the system for proper function.
What is your barrel length and gas system length, and what ammo are you using?
Drifter