G5: Velocity Issue
Marker has inconsistent velocity or your not able to adjust the pressure. Check the items below. Reference the manual as needed.
Battery: Make sure you start with a brand new battery in your gun as an old one will cause issues.
OPR Pressure: Verify your Operating Pressure Regulator (aka OPR or HPR) is supplying enough air to cycle your marker. Adjust if necessary. Turning the adjustment screw on the HPR clockwise will Decrease pressure to your marker while turning it counterclockwise will Increase pressure. When increasing pressure, do it 1/8th of a turn at a time.
Dwell: Check your dwell and try resetting it back to the factory default setting of 12ms.
Bolt o-rings: Remove the back cap and bolt and wipe them down to remove any lube or debris. Next, inspect the o-rings on each part for any visible damage and replace if needed. Before reinstalling, lube the o-rings with a small amount of Dow33 (or other recommended lube).