How to Fix an Airsoft M4

Airsoft guns precisely replicate military firearms, but fire plastic BBs at a relatively low velocity. The Aftermath Kirenex M4 is a detailed duplicate of the U.S. military M4, the carbine variant of the M16 assault rifle. Aftermath's Kirenex M4 is a motor-driven automatic-electric gun powered by a rechargeable battery pack. It fires 6 mm plastic BBs at a muzzle velocity of 380 fps. The Kirenex M4 propelling motor has an expected life of 50,000 BBs before replacement is required.

Instructions

  1. Motor Failure

    • 1

      Move the switch to "Semi" or "Auto" and test the firing mechanism. Verify that the selector switch is not on "Safe."

    • 2

      Charge the battery pack and verify proper connection to the gun. Check the positive and negative connectors leading to the battery pack. The connectors must not be reversed.

    • 3

      Lift the handguard to access the fusebox. Replace the fuse if it has blown.

    Non-firing Gun

    • 4

      Insert the magazine charging-rod in the magazine. Plunge it up and down several times to dislodge any BBs stuck in the magazine.

    • 5

      Run the cleaning rod through the muzzle to dislodge any BBs stuck in the barrel.

    • 6

      Inspect the motor-drive gear. Order a replacement gear if it is stripped, broken or damaged.

    No Full-Auto Operation

    • 7

      Charge the battery pack.

    • 8

      Place the magazine charging-rod in the magazine. Plunge it up and down several times to dislodge any BBs stuck in the magazine.

    • 9

      Consult with a dealer or approved service center if electrical malfunction is suspected.

    No Semi-Auto Operation

    • 10

      Charge the battery pack fully.

    • 11

      Set the selector switch to "Auto" and fire at least five shots. Set the selector switch back to "Semi" and attempt to fire single shots.

    • 12

      Consult with a dealer or approved service center if electrical malfunction is suspected.

    Reduced Range

    • 13

      Load the gun with proper airsoft plastic BBs. Standard metal BBs are too small and heavy for use in many airsoft guns.

    • 14

      Inspect the firing mechanism for leaking O-rings or a faulty piston spring.

    • 15

      Lubricate the motor-drive gear with a few drops of silicone oil.

    • 16

      Evaluate the condition of the motor-drive gear if it appears damaged. Order a replacement gear or overhaul if necessary.