Diamondback Firearms DB-15 Rifle

Posted: 04/23/2026

Diamondback Firearms DB-15 Rifle

The Diamondback Firearms DB-15 is a 5.56 NATO (accepts .223) direct gas impingement rifle, featuring a 16-inch 4150 CrMo black nitride barrel, 1:8 twist, and a 15-inch M-LOK handguard . Built on 7075-T6 aluminum receivers, it features a mid-length gas system, 5-round Magpul magazine, and a weight of roughly 7 lbs.

Specifications:

  • Caliber: 5.56 NATO / .223 Remington
  • Barrel: 16″ 4150 CrMo, Medium Profile, Black Nitride (1:8 Twist)
  • Gas System: Mid-Length
  • Receiver: Forged 7075 T-6 Aluminum (Upper/Lower)
  • Handguard: 15″ M-LOK
  • Trigger: Standard Mil-Spec
  • Weight: ~6.7 lbs
  • Overall Length: ~32.5″ (collapsed) – 36″ (extended)
  • Magazine: Magpul PMAG 5-Round
  • Muzzle Device: A2 Flash Hider (1/2 x 28 threads)