Technical information

2-9. ADJUSTING THE VELOCITY
The 68MICROMAG'S velocity is adjusted by turning the VELOCITY ADJUSTING NUT located at the
rear of the A.I.R. valve (see diagram).
NOTE: To properly adjust the gun's velocity a chronograph (velocity measuring device) will be required.
To adjust the velocity:
(1) Insert the 1/8 inch allen wrench into the VELOCITY ADJUSTING NUT
(2) To INCREASE the velocity, turn the Velocity Adjusting Nut CLOCKWISE
(3) To DECREASE the velocity, turn the Velocity Adjusting Nut COUNTER-CLOCKWISE
(4) After making the adjustment, fire several single shots (three to five) over the chronograph and observe
the reading.
(5) Repeat steps 1 thru 4 as required.
NOTE: The 68Micromag's velocity can be adjusted over a wide range. A small adjustment of
approximately 1/4 turn will change the velocity by as much as 30 feet per second or more.
WARNING
: Shooting velocities in excess of 300 Feet Per Second are potentially illegal and extremely
dangerous.
NOTE: In the event that the 68MICROMAG's valve pressure has been adjusted too high, the PRESSURE
RELIEF VALVE will vent gas out through the back of the gun. This is a safety feature built into the gun
and is NOT user adjustable. Should the gun be venting gas out the rear of the valve:
Adjust the velocity by turning the VELOCITY ADJUSTING NUT a full turn COUNTERCLOCKWISE
If gas is still venting from the rear of the velocity adjuster, continue to turn the velocity adjusting nut
counterclockwise until gas no longer vents.
Chronograph the gun
Adjust accordingly.
If air continues to vent out the back of the gun, seek assistance from a qualified technician.
2-10. ADJUSTING THE PROPELLANT TANK INPUT PRESSURE
CO2 tanks require no input pressure adjustment.
Regulated compressed N2 or compressed air tanks MAY require adjustment. Please refer to the
manufacturer's product guide for this information.
An input pressure of 650 psi (pounds per square inch) is adequate to supply the gun with working pressure.
However, in order to avoid fluctuations in gun pressure and to prevent 'shoot-down' problems (the velocity
of each shot drops lower in rapid-fire situations) it is recommended that the input pressure be set between
750 and 900 psi.
Lower input pressures will increase the number of shots you will get from a tank, but will also increase
shot-to-shot velocity fluctuations and may increase the incidence of shoot-down.
Higher input pressures will decrease the number of shots from a tank, and will also reduce shot-to-shot
velocity fluctuations and decrease the chances of shoot-down.