Rifle | Semi-AutomaticDiamondbackSold by Sportsmans Guide

Diamondback

Diamondback DB15 Semi-Auto 5.56 NATO 16" Barrel 30+1 Rounds

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

16" 5.56

A 30-round Magpul Gen M2

Forged 7075-t-6

Aluminum upper and lower receiver

15" M-lok

Handguard provides mounting space for

16" Medium

Black nitride finish

Carbine-length Gas

System and standard mil-spec trigger

$529.99
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SKU: WX2*0749854

Overview

Built for shooters who want a straightforward, ready-to-run rifle, this model pairs a 16" 5.56 NATO barrel with a carbine-length gas system and an optic-ready A3 flattop upper. The 15" M-LOK handguard provides ample space for accessories, while the Magpul MOE grip and included 30-round PMAG give it a practical out-of-the-box setup. Forged 7075 T-6 aluminum upper and lower receivers, along with a standard mil-spec trigger and A2 flash hider, keep the package grounded in familiar AR-15 configuration. It suits range use, training, and general-purpose shooting where modularity and a complete factory build matter.

Why Hunters Choose the Diamondback

Forged 7075

T-6 aluminum upper and lower

15-inch M-lok

Handguard provides ample space for

16-inch 4150

Black nitride finish and 1:8

Carbine-length Gas

System supports smooth, consistent cycling

Includes Magpul

MOE grip and 30-round PMAG

Key Features

  • 16" 5.56 NATO chambering with a 30-round Magpul Gen M2 PMAG included
  • Forged 7075-T-6 aluminum upper and lower receiver construction
  • 15" M-LOK handguard provides mounting space for accessories
  • 16" medium contour 4150 CrMov barrel with black nitride finish
  • Carbine-length gas system and standard mil-spec trigger
  • Optic-ready A3 flattop upper with black hard-coat anodize finish

Best Used For

  • Hunters wanting an optic-ready rifle for range practice and familiarization before season
  • Users who prefer a carbine-length setup with a 16-inch barrel and included magazine
  • Shooters planning to add accessories using the 15-inch M-LOK handguard
  • Those seeking a straightforward, out-of-the-box rifle with standard mil-spec features

Specifications

ActionSemi-Auto
Assembly LocationCocoa, Florida
Barrel FinishBlack nitride
Barrel Length16"
Barrel Material4150 CrMov
Barrel ProfileMedium contour
Blade FinishBlack hard-coat anodize
Bolt Carrier GroupShot-peened, MPI mil-spec 8620 carrier BCG
Caliber5.56 NATO
Country Of OriginUSA
Gas SystemCarbine-length
GripMagpul MOE grip
Handguard Length15"
Handguard TypeM-LOK
Lower Receiver MaterialForged 7075 T-6 aluminum
Magazine Capacity30-round
Magazine IncludedMagpul Gen M2 PMAG
Muzzle DeviceA2 flash hider
Optic ReadyA3 flattop upper
Thread Pitch1/2x28
TriggerStandard mil-spec trigger
Twist Rate1:8 RH
Upper Receiver MaterialForged 7075 T-6 aluminum

Pros

  • Forged 7075 T-6 aluminum upper and lower for a durable receiver set.
  • 15-inch M-LOK handguard provides ample space for accessories and setup options.
  • 16-inch 4150 CrMov barrel with black nitride finish and 1:8 RH twist.
  • Carbine-length gas system supports smooth, consistent cycling.
  • Includes Magpul MOE grip and 30-round PMAG for an out-of-box package.
  • Optic-ready A3 flattop upper allows straightforward sight or optic mounting.

Considerations & Trade-offs

  • The 30-round PMAG is included, but magazine capacity and availability may need to be checked against local laws and range rules before use.
  • It ships with a standard mil-spec trigger, so buyers looking for a refined trigger feel may want to plan for an upgrade later.
  • The rifle is optic-ready with an A3 flattop upper, but optics and mounting accessories are not included.
  • The 15" M-LOK handguard offers substantial accessory space, which can add bulk once fully outfitted with lights, grips, or other gear.

Suggested Comparisons

  • AR-15 style semi-automatic rifles
  • 5.56 NATO chambered rifles
  • Optic-ready carbines
  • M-LOK handguard rifles

Suggested Accessories

  • Optic mount or red dot sight
  • Weapon light
  • Backup iron sights
  • Sling

Frequently Asked Questions

What caliber or chambering does the DB15 use?

The DB15 is chambered in 5.56 NATO.

Is this rifle optic-ready?

Yes. The product description lists an optic-ready A3 flattop upper.

What comes included with the rifle?

The listed included items are a Magpul Gen M2 PMAG 30-round magazine and a Magpul MOE grip.

What type of handguard does it have?

It comes with a 15" M-LOK handguard.

Where is the DB15 made?

The description states it is made in the USA and built at Diamondback's facility in Cocoa, Florida.