At Daniel Defense, our customers are central to everything we do — your trust and support make us who we are today — and our commitment to you is to deliver products that will be trusted for generations to come.

That’s why we stand behind every one of our firearms with our 100% Lifetime Guarantee.

Trust is built through open, honest communication.

Thanks to that open communication, we heard your overwhelmingly positive feedback, but we were also made aware of a keyholing issue that has been experienced by less than 2% of DANIEL H9 owners.

We have tirelessly and extensively tested solutions — leading us to re-engineer the design of the barrel as well as the recoil spring assembly.

So, we will be upgrading your DANIEL H9’s barrel and recoil spring assembly.

Follow the instructions below to see if your DANIEL H9 still requires the upgrade.


Follow the instructions below to find out now.


  1. Enter your DANIEL H9® serial number in the box below. (The serial number will start with an "H9" and is located on the right side of the handgun, between the grip panel and the bottom of the slide. see image below)
  2. If your DANIEL H9 serial number is indicated to be within the scope of still needing the upgrade, follow the H9 Upgrade Process below.


If at any time you have questions regarding this process, please contact customer service at 866-554-4867

  1. REMOVE THE MAGAZINE, CLEAR THE FIREARM, and always follow the NRA Gun Safety Rules.
  2. Remove all custom/aftermarket accessories. (Optics, RDS Plates, Lights, etc...)
  3. Place the handgun in your original hard case, with the provided gunlock included.
  4. Fill out the RMA (Return Merchandise Authorization) form. (Click the button below.)
  5. 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.
  6. Ship the cased handgun, as packaged in step 3 above, to Daniel Defense using the provided UPS shipping label and box.
  7. Daniel Defense will inspect and perform the necessary upgrade(s) to your firearm in the most expeditious manner.
  8. Once the upgrade is complete (including replacing parts, cleaning, oiling, and test firing) your handgun will be shipped back to you, and tracking information will be provided, via the email you used on the RMA Form (from step #4).

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


Please call Daniel Defense Customer service at 866-554-4867.



    • 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.

    • 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.
    • Cleaning
      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


Daniel Defense Satisfaction Guarantee
Guaranteed Satisfaction

All Daniel Defense products carry a 100% satisfaction guarantee against defects in original materials and workmanship. If your Daniel Defense product shows evidence of such defects, Daniel Defense will make every accommodation to fix, repair, or replace your product in the most expeditious manner possible. Daniel Defense does not warranty products or damage caused to our products by the correct or incorrect installation of other manufacturer's products.