DDM4 Disconnector Safety Notification

Daniel Defense is committed to the highest level of quality and safety. In keeping with that commitment we are issuing a safety notification related to a condition we identified with the Disconnector in the Fire Control Group. This safety notification applies to certain firearms manufactured between April 1, 2016 and March 3, 2017. In a few cases, a double fire condition has occurred with a single pull of the trigger. In the Company’s spirit to always do the right thing, Daniel Defense will correct any and all potential conditions at no cost to the consumer as part of our 100% Satisfaction Guarantee.

Does This Safety Notification Apply to My Firearm?

Daniel Defense firearms containing a single-stage Fire Control Group, manufactured between April 1, 2016 and March 3, 2017, MAY fall within the scope of this Safety Notification.

This is an important Safety Notification and should be followed by all owners of Daniel Defense firearms.

Identification Process

  1. Enter your firearm’s serial number in the box below. (The serial number is located on the left side of the lower receiver.)

    Safety Notification Zoom
  2. If your firearm’s serial number is indicated to be within the scope of this safety notification STOP USING THE FIREARM IMMEDIATELY and follow the Corrective Action Process.

Outside The USA?

Please call Daniel Defense Customer service at 866-554-4867. If you reside in Canada please CLICK HERE

Corrective Action Process

  1. REMOVE THE MAGAZINE, CLEAR THE FIREARM and always follow the NRA Gun Safety Rules.
  2. Click Here to fill out the Return Merchandise Authorization Form.
  3. A Daniel Defense representative will contact you as soon as possible to provide you with shipping instructions, including a pre-paid and pre-addressed UPS shipping label and box.
  4. Remove the upper receiver from the lower receiver by removing the front pivot pin and the rear take down pin. Reference the Daniel Defense owner’s manual at Section 3.7, p. 11 for more detailed instructions.
  5. Ship the lower receiver to Daniel Defense using the pre-paid and pre-addressed UPS shipping label and box.
  6. Daniel Defense will inspect and perform a corrective action in the most expeditious manner.
  7. Once the inspection is complete and any necessary corrective action is taken, the lower receiver will be shipped back to you and tracking information will be provided.

Daniel Defense is required by ATF regulations to return the lower receiver to the owner and their mailing address as initially provided by the consumer. All shipments are subject to an adult signature requirement.

Note - For more information regarding this Safety Notification, please see the following video.


  1. The fundamental NRA rules for safe gun handling are:
    ALWAYS Keep The Gun Pointed In A Safe Direction
    This is the primary rule of gun safety. Common sense dictates the safest direction, depending on different circumstances.
    ALWAYS Keep Your Finger Off The Trigger Until Ready To Shoot
    When holding a gun, rest your finger alongside the frame and outside the trigger guard. Until you are actually ready to fire, do not touch the trigger.
    ALWAYS Keep The Gun Unloaded Until Ready To Use
    If you do not know how to open the action or inspect the chamber(s), leave the gun alone and get help from someone who does.
  2. When using or storing a gun, always follow these additional NRA rules:
    Know your target and what is beyond.
    Be absolutely sure you have identified your target beyond any doubt. Equally important, be aware of the area beyond your target. This means observing your prospective area of fire before you shoot. Never fire in a direction in which there are people or any other potential for mishap. Think first. Shoot second.
    Know how to use the gun safely.
    Before handling a gun, learn how it operates. Know its basic parts, how to safely open and close the action and remove any ammunition from the gun or magazine. Remember, a gun's mechanical safety device is never foolproof. Nothing can ever replace safe gun handling.
    Be sure the gun is safe to operate.
    Just like other tools, guns need regular maintenance to remain operable. Regular cleaning and proper storage are a part of the gun's general upkeep. If there is any question concerning a gun's ability to function, a knowledgeable gunsmith should look at it.
    Use only the correct ammunition for your gun.
    Only BBs, pellets, cartridges or shells designed for a particular gun can be fired safely in that gun. Most guns have the ammunition type stamped on the barrel. Ammunition can be identified by information printed on the box and sometimes stamped on the cartridge. Do not shoot the gun unless you know you have the proper ammunition.
    Wear eye and ear protection as appropriate.
    Guns are loud and the noise can cause hearing damage. They can also emit debris and hot gasses that could cause eye injury. For these reasons, shooting glasses and hearing protection should be worn by shooters and spectators.
    Never use alcohol, over-the-counter drugs or prescription drugs before or while shooting.
    Alcohol, as well as any other substance likely to impair normal mental or physical bodily functions, must not be used before or while handling or shooting guns.
    Store guns so they are not accessible to unauthorized persons.
    Many factors must be considered when deciding where and how to store guns. A person's particular situation will be a major part of the consideration. Dozens of gun storage devices, as well as locking devices that attach directly to the gun, are available. However, mechanical locking devices, like the mechanical safeties built into guns, can fail and should not be used as a substitute for safe gun handling and the observance of all gun-safety rules.
    Additional Safety Precautions
    Be aware that certain types of guns and many shooting activities require additional safety precautions.

    Regular cleaning is important in order for your gun to operate correctly and safely. Taking proper care of it will also maintain its value and extend its life. Your gun should be cleaned every time that it is used.

    A gun brought out of prolonged storage should also be cleaned before shooting. Accumulated moisture and dirt, or solidified grease and oil, can prevent the gun from operating properly.

    Before cleaning your gun, make absolutely sure that it is unloaded. The gun's action should be open during the cleaning process. Also, be sure that no ammunition is present in the cleaning area.

    Please see: https://gunsafetyrules.nra.org