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How to Fix Barrel Wobble on a TM M4

The Tokyo Marui Co. (TM) manufactures nonlethal air gun replicas of military weapons. The M4 carbine is an evolved version of the M16 rifle. The M4 is used by special operations troops and may eventually succeed the M16 as a general issue rifle. The replica rifle is all-aluminum, powered by an electric motor, and has an 82 BB magazine. The TM M4 costs about $550 (as of publication date) and is sold to enthusiasts and police departments that use this nonlethal version of the M4 for training. If your TM M4 should develop barrel wobble, you can fix the problem with the use of a couple of tools.

Things You'll Need

Tongue and groove pliers
Allen keys

Instructions

- 1
  Remove the upper and lower hand guards by pulling back the delta ring at the base of the barrel near what would be the receiver group in a real M4.
- 2
  Loosen the delta ring by turning it counterclockwise and pull the ring and the spring behind the ring to the front of the barrel to access the main nut.
- 3
  Tighten the main nut by turning it counterclockwise with a pair of tongue and groove pliers.
- 4
  Replace the delta ring and spring and tighten the delta ring by turning it clockwise.
- 5
  Tighten both Allen screws on the top and bottom of the barrel assembly in front of the delta ring with an Allen key.
- 6
  Pull back the delta ring and replace the upper and lower hand guard.

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