The Diamondback DB15 Carbon Series AR-15 5.56 NATO 16" Rifle with Viridian Venta Green Dot – Black/FDE (DB175AK222) is a feature-packed, ready-to-run 5.56/.223 AR-15 rifle and optic combo tailored for shooters who want a reliable, lightweight carbine with modern furniture and a factory-mounted green dot sight. This Sports South Exclusive configuration combines Diamondback’s proven DB15 Carbon Series platform with a Viridian Venta 1x20 green dot optic and Black/FDE two-tone styling, giving you a complete, optics-equipped rifle straight out of the box. Impact Guns+3Diamondback Firearms+3Classic Firearms+3
Whether you’re building a home-defense AR, a range workhorse, or a patrol-ready carbine, the DB15 16" M-LOK with Viridian, Black/FDE delivers the accuracy, ergonomics, and value you’re looking for.
Carbon Series 5.56 NATO AR-15 – Built on Proven DB15 Foundations
This model is part of the DB15 Carbon Series, Diamondback’s value-driven AR-15 line that focuses on essential features and reliability without unnecessary extras. Diamondback Firearms
Key platform highlights:
Diamondback’s Carbon Series DB15 rifles are assembled in Cocoa, Florida, using quality components like forged 7075-T6 receivers, 4150 CrMov barrels, and free-float M-LOK handguards—delivering a dependable AR-15 you can run hard at the range or in competition. Diamondback Firearms+2Diamondback Firearms+2
16" 4150 CrMov Barrel with FDE Cerakote – Accuracy & Durability
At the heart of the DB175AK222 is a 16" medium-profile 4150 CrMov barrel, treated with black nitride for corrosion resistance and topped with an FDE Cerakote finish for added style and protection. Diamondback Firearms
Barrel specs & benefits:
Length: 16" – the classic carbine barrel length for AR-15 rifles
Material: 4150 CrMov (chrome-moly-vanadium) steel for longevity and heat resistance
Twist Rate: 1:8" RH – ideal for a wide range of 5.56/.223 bullet weights Diamondback Firearms
Finish: Black nitride with FDE Cerakote on the barrel for a durable two-tone look
Muzzle Device: Standard A2 flash hider, 1/2x28 threads for easy aftermarket swaps Diamondback Firearms+2Classic Firearms+2
The medium contour and 1:8 twist rate give you a solid balance of accuracy, heat management, and handling—perfect for everything from training classes to defensive roles.
Carbine-Length Gas System & Mil-Spec BCG – Reliable Cycling
This DB15 Carbon Series rifle uses a carbine-length gas system paired with a shot-peened, MPI-tested mil-spec 8620 bolt carrier group. Diamondback Firearms
Gas System: Carbine-length, direct impingement for proven reliability across common loads
BCG: Shot-peened, Magnetic Particle Inspected mil-spec 8620 carrier and bolt – built to handle high round counts and adverse conditions Diamondback Firearms+1
Combined with quality machining and materials, this setup provides smooth, consistent cycling and durability for long-term use.
Forged 7075-T6 Receivers & 15" Free-Float M-LOK Handguard
The DB175AK222 uses forged 7075-T6 aluminum upper and lower receivers, the industry standard for serious AR-15 builds. Diamondback Firearms+2Classic Firearms+2
Upper: A3 flat-top receiver for easy optic mounting and backup sight options
Lower: Diamondback’s DB Carbon lower, also forged 7075-T6, giving you a strong foundation for future upgrades Diamondback Firearms
Up front, a 15" free-float M-LOK (WS-Rail) handguard runs nearly the full length of the barrel:
Maximizes sight radius if you add BUIS
Offers abundant M-LOK slots for lights, grips, bipods, and accessories
Free-float design helps enhance accuracy by keeping the handguard off the barrel Diamondback Firearms+2Classic Firearms+2
This combination of free-float rail and forged receivers gives you a stable, modular AR-15 platform that’s easy to customize.
Magpul Furniture in FDE – Ergonomics & Two-Tone Style
The rifle ships with Magpul furniture in Flat Dark Earth, complementing the black receivers and FDE barrel for a clean two-tone look. Freedom Outdoors+3Diamondback Firearms+3Classic Firearms+3
Included furniture:
Magpul MOE Grip (FDE): Textured, ergonomic pistol grip for improved control and comfort
Magpul Carbine Stock (FDE): 6-position adjustable stock (on a mil-spec extension), allowing you to set length of pull for different shooters, gear, or shooting positions Classic Firearms+2Range USA+2
Diamondback’s Black/FDE color scheme not only looks sharp but also offers practical advantages in bright sun and mixed environments where full-black rifles can stand out more.
Factory-Mounted Viridian Venta 1x20 Green Dot Sight
A major selling point of this package is the included Viridian Venta 1x20 green dot optic, Cerakoted in FDE to match the rifle’s accents. Impact Guns+3Diamondback Firearms+3Classic Firearms+3
Viridian Venta highlights:
1x20mm green dot – quick target acquisition with both eyes open
Bright, daylight-visible green reticle suited for close to mid-range work
Factory-matched FDE Cerakote finish for a seamless look on the DB15 Carbon Series
Comes mounted on the flat-top receiver, so the rifle is range-ready right out of the box
No need to shop for a separate optic or worry about compatibility—the Viridian Venta is already matched and mounted to this AR-15.
Lightweight, Well-Balanced, and Ready to Run
Despite the 15" rail and full-featured setup, the Diamondback DB15 Carbon Series 5.56 with Viridian weighs in at approximately 6.9 lbs and measures about 32.5" in overall length (collapsed). Diamondback Firearms
That means:
Easy handling for home defense, range drills, or patrol-style carry
A balanced feel between the stock, receiver, and rail for faster transitions
Manageable weight for extended sessions or classes without excessive fatigue
It’s a great all-around AR configuration for shooters who want one rifle that can do a bit of everything.
Included Magazine & Capacity
Each DB175AK222 rifle ships with a 30-round Magpul PMAG (Gen M3, Medium Coyote Tan), giving you a reliable, battle-proven magazine from day one. Diamondback Firearms+2Classic Firearms+2
Magazine: Magpul PMAG 30-round polymer magazine
Standard AR-15 30-round capacity (where legal), ideal for defensive use, training, and competition
Combined with the Viridian optic, this makes the DB15 Carbon Series a true “open the box and go shoot” AR-15 package.
Technical Specifications – DIA 5.56 DB15 16" M-LOK w/ Viridian Black/FDE
Why Choose the DIA 5.56 DB15 16" M-LOK w/ Viridian Black/FDE?
If you want a complete AR-15 rifle and optic package that’s ready for the range, training, or defensive use right away, the Diamondback DB15 Carbon Series 5.56 NATO 16" with Viridian Venta Green Dot – Black/FDE (DB175AK222) is a standout option.
You get:
A reliable, forged-receiver AR-15 chambered in 5.56/.223
A quality 16" 4150 CrMov barrel with free-float 15" M-LOK handguard
Magpul MOE grip and Magpul carbine stock in FDE
A factory-matched Viridian Venta 1x20 green dot optic
A stylish and functional Black/FDE two-tone finish
The value and performance of the DB15 Carbon Series platform
For shooters looking to maximize performance and minimize guesswork, this DIA 5.56 DB15 16" ML w/ Viridian Black/FDE combo delivers a well-thought-out, optics-equipped AR-15 that’s ready to go the moment you open the box.
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