Diamondback DB15 5.56 NATO AR-15 Rifle – 16 in Threaded Barrel, Free-Float M-LOK Handguard, Adjustable Stock, Matte Black
This Diamondback DB15 (MFG PN: DB15BGB) is a 5.56 NATO, direct-impingement AR-15 with a 16-inch threaded barrel and a free-float M-LOK aluminum handguard. It features a flat-top, T-marked Picatinny upper with forward assist, dust cover, and case deflector, plus a multi-port brake/compensator already installed. The rifle is finished in matte black, includes an adjustable stock and Magpul polymer grip, and comes with its factory box, manual, and a 30-round magazine.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are light handling marks from prior use visible on the exterior surfaces. Please refer to the photos for close-up views.
What’s Included
- Owner's manual
- Factory box with Diamondback DB15 label
- Short M-LOK Picatinny rail section (installed)
- 1x 30-round polymer AR-15 pattern magazine (brand unspecified)
The DB15 is built around a full-length, flat-top upper that is T-marked for repeatable mounting positions. It includes a forward assist, dust cover, and case deflector, with the ejection-port cover stenciled "5.56 / NATO" for quick chambering ID. The top rail provides continuous Picatinny mounting space across the receiver.
The 16-inch barrel is threaded and fitted with a multi-port brake/compensator. A free-float M-LOK aluminum handguard surrounds a low-profile gas block, improving accessory placement and providing a slim, rigid interface. The handguard features Diamondback's shield logo and molded textured panels, and a short M-LOK Picatinny rail section is installed for immediate accessory use.
Furniture includes an adjustable polymer stock and a Magpul polymer grip for a secure, modern control layout. The listed length of pull is 10.5 inches, and the rifle ships without sights installed to let the buyer configure their preferred aiming setup.
Receivers are alloy with a matte black finish. The lower is marked "CAL. MULTI" and "Diamondback Firearms, LLC Cocoa, FL USA." Capacity is 30+1 with the included magazine. This DB15 is made in the USA and configured for the 5.56mm NATO cartridge, with direct-impingement operation on the AR-15 platform.