Diamondback DBX57 5.7x28 Semi Auto Pistol

FC-810035752337 Diamondback Firearms DBX57CFB

Diamondback DBX57 5.7x28 Semi Auto Pistol
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FC-810035752337 Diamondback Firearms DBX57CFB
Model DBX57CFB 
Action Semi-Automatic 
Caliber 5.7x28mm 
Capacity 20 
Barrel Length 8" 
Frame Finish Black 
UPC 810035752337 
Ships Ships Within 1 to 3 Business Days After Valid FFL is Received 
  • All firearm sales are final. NO RETURNS.
  • Return to manufacturer for warranty service.
  • Actual buyer must pickup from FFL dealer who will conduct the background check. Learn more
  • Firearm transfer must be the actual transferee/buyer. Click here to see BATFE form "Transaction Record Part 1".
  • Firearms are only available for purchase online.
Typically ships within 5 to 7 business days when a valid FFL is received

A $16.95 handling fee will be charged per order. No additional charge for multiple firearms on an order.

The DBX57 functions on a simple design method based on a locked breech dual gas piston system. The frame is made from 7075 Aluminum with a hard coat anodized finish. It has a very AR-15 style feel with a pistol grip, controls, and fire control group. The M-LOK modular attachment interface hand guard allows for various accessories to be attached. Additionally it is worth noting that standard 20 round Fn Five-SeveN compatible pistol magazines are used to run this firearm. This particular version comes without a pistol stabilizing brace however with the rear picatinny rail on the receiver you can easily add one.

Specifications and Features:
Locked Breech, Dual Gas Piston Semi Auto Pistol
8" Barrel
1:9" Right Hand Twist Rate
Barrel Threaded 1/2x28 Right Hand
DBX Muzzle Device
7075 Aluminum Frame (Hard Coat Anodized Matte Black)
6061 Aluminum M-LOK Compatible Hand Guard
Standard AR-15 Mil-Spec Trigger
Magpul MOE K Pistol Grip
20 Round Magazine (FN Five-SeveN Compatible)
Overall Length 15.25"
Overall Height 7.3"
Overall Width 1.75"
Overall Weight Empty 3.0lbs
Matte Black

Buying a Firearm Online is Easy!
  • Add your selected firearm(s) to your shopping cart and check out.
  • Select a local Federal Firearms Licensed (FFL) Dealer that will accept the firearm and complete the transfer. Find a FFL Dealer HERE.
  • If you choose an FFL Dealer that is not on our preferred list, you or your FFL Dealer will be required to fax or email us a signed copy of the Federal Firearms License referencing your Cheaper Than Dirt! order number. Download the Firearm Sales Form
  • Pick up your firearm from the FFL Dealer, who will need to do a criminal and mental health background check. Transfer fees may apply.
Buying Firearms on the Internet

Federal law requires firearms to be shipped to FFL Dealers. For an individual to receive a firearm from Cheaper Than Dirt! it must be shipped to an FFL Dealer in your state.

Locating a Federal-Firearm License Dealer (FFL) in Your Area

There are thousands of FFL Dealers in the United States. You may choose an FFL Dealer from our preferred listing or you may find a dealer in your area. To find a list of FFL Dealers in your area area CLICK HERE. If you choose a dealer that is not on our preferred list, either you or the FFL Dealer will be required to submit a copy of the Federal Firearms License referencing your Cheaper Than Dirt! order number. The FFL Dealer will usually charge a fee to conduct the transfer. There are duties that the FFL Dealer is required to do during the process which include a criminal and mental health background check through NICS. Remember, the FFL Dealer is doing you a favor and the process takes time to complete. Fees can vary so check with the FFL Dealer ahead of time to request a quote on the fees associated with your firearm transfer. The FFL Dealer is in business to make a profit and your internet purchase may be viewed as competition to their retail business. If you feel the fees are too high, you can search for another FFL Dealer.

Completing the Transaction

Once you place the firearm in your cart and checkout you will receive a confirmation email that has your order number and further instructions. We will verify the FFL license and also make the FFL Dealer aware that an order from Cheaper Than Dirt! will soon be arriving for you. Most orders are processed within 2-3 business days from the time we receive and verify the FFL Dealers information. Once shipped, your firearm will arrive at the FFL Dealer within 3-7 days business days. The FFL Dealer will begin processing the shipment. It may be an additional day or so before the FFL Dealer is ready to conduct the transfer of the firearm to you. Call the FFL Dealer and set an appointment to confirm that the firearm is ready to be transferred.

Please note! All Firearm Sales are Final

It is important to thoroughly inspect your firearm before completion of the transfer. Once the firearm is transferred into your name, Cheaper Than Dirt! will not accept a return or exchange under any circumstance. If a defect is discovered after completing the transfer, you must contact the manufacturer directly for repair or replacement.