Diamondback Firearms DB15 5.56 Barreled AR-15 Upper Receiver 16" - Black

Manufactured by Diamondback Firearms
Manufactured by Diamondback Firearms
6 Reviews

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The Diamondback Firearms DB15 Barreled Upper Receiver chambered in 5.56 NATO is a high quality and durable AR upper. It boasts a 16-inch barrel precision machined from 4150 CMV steel and black nitride coating providing the highest quality and unrivaled durability. The DB15 upper is hammer forged from mil-spec 7075-T6 aluminum with a type III hard coat providing the strength and toughness to withstand the most severe abuse and provide maximum corrosion resistance.

  • Manufactured by Diamondback Firearms
  • 5.56 NATO/.223 Remington
  • 16” 4150 CMV barrel with black nitride finish
  • 15” M-LOK handguard 
  • 7075-T6 aluminum
  • Type III anodized hard coat
  • Carbine length gas system

This upper by Diamondback is the total package with unrivaled strength and reliability allowing you to confidently navigate any scenario. It features a 15” M-LOK SL handguard offering increased ergonomics, maximum airflow and modularity for optimal performance and durability. The upper provides a picatinny rail along the top which allows room for sights, optics and accessories. The Diamondback DB15 Barreled upper receiver is a quality AR-15 upper for your next build at a reasonable price. 
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AssemblyBarreled Assemblies
Barrel Coating
Barrel Length16
Barrel Material4150 Chrome Moly Steel
BrandDiamondback Firearms
Caliber Gauge5.56 NATO
Gas System LengthCarbine
Gas System TypeDirect Impingement
Handguard15 in M-LOK Rail
Muzzle DeviceA2 Flash Hider
Thread Pattern1/2 X 28

Ratings & Reviews

6 reviews

  • 3 stars
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fantastic upper


I purchased this upper back in july with a BCG from DB as well and after hundreds of rounds i have had 0 malfunctions although i can not judge its accuracy as i am limited to 20 meters maximum range.


by -

Perfect fit in my Spikes Anderson and BCM lowers Highly recommend

Back 5.56 MLOK Upper


I am very pleased about this DB Upper. The Price, Quality, and Finish is amazing. I will be ordering another one. It looks so Sweet with my FML Lower.

Diamondback 5.56 MLOK Upper


I am very pleased with my DB upper. The Price, Quality, and finish is amazing. It was better than I expected. I will be ordering another.

Great upper


Great upper for the price, perfect for my PSA lower.

Budget upper

by -

Bought this during Armageddon for $300. Fits snug on my palmetto lower with no rattle. Get 1.5 moa groups @ 50yrds. Enough for combat. Carbine gas length kicks harder than mid length. It's a steal right now for $230.