Diamondback DB15 5.56 NATO AR-15, 16" Threaded Barrel, FDE Finish, Free-Float M-LOK, Magpul ACS Stock, Ambi Charging Handle, Flip-Up Sights, 2 PMAGs
This Diamondback DB15 stands out with its FDE-finished receivers and handguard, slick-side upper, and a 16-inch threaded barrel capped with a Diamondback two-chamber muzzle brake. It features a free-float M-LOK handguard with a full-length T-marked Picatinny rail, an ambidextrous charging handle, and polymer flip-up sights installed. Magpul furniture, including the ACS adjustable stock and polymer pistol grip, rounds out a setup that is ready to run and easy to configure.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape. There are minor, superficial scratches and blemishes present. The bore is clean and shiny.
What’s Included
- Hard rifle case
- Diamondback Firearms DB15 manual
- 2x 30-round Magpul PMAG windowed polymer magazines marked for 5.56 NATO
- Polymer flip-up front and rear iron sights (installed)
- Ambidextrous charging handle (installed)
- Diamondback two-chamber muzzle brake (installed)
- Polymer M-LOK hand stop (installed)
- Textured M-LOK rail cover panels (installed)
- Magpul ACS adjustable stock (installed)
- Magpul polymer pistol grip (installed)
The DB15 is a direct-impingement, semi-automatic AR-15 chambered in 5.56 NATO with a 16-inch threaded barrel and a Diamondback two-chamber muzzle brake installed. Its slick-side upper deletes the forward assist while retaining a brass deflector, and the flat-top Picatinny rail is T-marked for easy reference. The ejection port cover is stenciled "5.56 NATO."
An aluminum free-float M-LOK handguard provides mounting slots with a full-length top rail. It includes textured M-LOK panel inserts for grip and a QD sling socket. A polymer M-LOK hand stop is installed for added control, and polymer flip-up front and rear sights come mounted.
Ergonomics and controls are well-appointed with an ambidextrous charging handle, a flat-faced single-stage trigger, a Magpul ACS adjustable stock, and a Magpul polymer pistol grip. The rifle wears an FDE finish on the receivers and handguard paired with black furniture.
Feeding is via the STANAG/AR-15 magazine interface, and this rifle comes with two 30-round Magpul PMAG windowed magazines. It ships with a hard rifle case and the Diamondback DB15 manual. Additional details include a bolt carrier marked with the DB shield logo and USA manufacture.




