Prime support

If your Prime marker is not functioning as expected, please check this page first, before you contact technical support. It may be caused by something simple, which you can fix yourself, helping you to get onto the field faster.

Prime does not shoot, when I pull the trigger, the bolt doesn’t really move, or shoots weakly

This is usually caused by a worn or dry M16-2 o-ring on the bolt. If you remove the drive, change the bolt, and relube with Militia Lube, you will be up and running in no time.

If changing the o-ring does not help, please try a fresh battery, and try changing the bolt tip for a new one.

Another cause may the the dwell setting on your gun, please make sure it is set to 12ms or above. In very cold weather (below 10C or 50F), don’t be afraid to increase your dwell to 16ms.

Gun does not shoot, and makes no noise at all

Please check these things:
– The air is turned on
– Your gun has a fresh battery, and the battery meter reads full
– The trigger is pressing the microswitch on the board
– press and hold the trigger for two seconds, this should force a shot. If the gun fires, then it means your eyes need cleaning.

When I shoot a string of paint, the gun seems to shoot down (lower velocity)

This is usually caused by a worn or dry M16-2 o-ring on the bolt. If you remove the drive, change the bolt, and relube with Militia Lube, you will be up and running in no time.

If changing the #16 o-ring does not help, please try a fresh battery.

Another cause may be a damaged regulator seat, try reversing your regulator seat, ensuring the cap is on tightly.

My first shot is too high over the chrono

If your gun seems to build to a high show when you let it sit for a little while, you probably have a slow leak in your regulator. To rectify this, follow these simple steps:

1. Degas your marker completely – MAKE SURE IT IS FULLY DEGASSED.
2. Remove the left hand side of your wrap around grip so that you can access the regulator screw.
3. Unscrew the regulator and remove it from the gun. Use a spanner and allen key to split the regulator in half.
4. Inspect and reverse the seat. Inspect the piston face for damage. Replace either of these items if they are damaged.
5. Replace and re-chrono your gun

My first shot is weak, then the gun fires with more power

Please check these things:
1. The battery is fresh
2. The dwell is set to at least 12ms
3. The drive is clean and greased, with a fresh M16-2 o-ring installed

Gun not turning on

If your gun does not power on at all, then your problem must be in the electronic system. Please try these things:
1. Replace your battery with a new one.
2. Check that your battery connector is fully plugged in (both to the battery and board), and is not broken.
3. Check that the on/off button on the back of your board is being pressed.
4. Check that your board is not wet or damaged.
5. Check your breech to see if it has the eyes lit. If they are lit, you do not have a problem with your power supply, only with the display module. Please power off your board, then unplug the display module. Carefully, and firmly, reconnect the display module before trying the power again

Leaking down the barrel

A leak that seems to be coming down the barrel from your drive, is usually caused by the #14 o-ring on the valve. Please change this for a new one, and it should solve your problem.

Using too much air

If your gunis using more air than you expect, please verify that there is not a leak in your gun or air system. You should be able to hear a leak if you take the gun someplace quiet. Most leaks are caused by failed o-rings or loose ASAs etc.

If you are sure there is no leak, change the #19 inside the keg, this o-ring is largely responsible for air efficiency on the Prime. Make sure your gun is well greased with Militia Lube.

Check to be sure your gun has a reasonable paint to barrel match. If your paint is too loose in the barrel, you will waste air during the shot.


Software updates

If your software is not 1.20 (the latest), you can update it by following the instructions on this page.

Exploded view

Click on the drawing to see a full list of parts and part numbers. If you talk to a MacDev tech, you can use the unique part number to identify the part exactly. You will also find that part numbers are an easy way to search the MacDev store for spare parts.

Maintenance tips

– Clean off and replace old grease occasionally. Dirty grease will wear out your gun seals and parts.
– Use MacDev Militia Lube for best results.
– Replace your detents and bolt tip if they get out of shape.
– Replace the M16-2 on your bolt, and your battery before an important tournament – to ensure your gun is running at its best!

Still need help?

Contact a tech.