Diamondback DB Barrel — 5.56x45mm NATO, 10" Carbine-Length, Black Nitride, 4150 Chrome Moly Vanadium Steel | Model 556C10M50B8R (UPC: 815875019176)
Build a compact, reliable AR-platform that punches above its size with the Diamondback DB 10" 5.56x45mm NATO Barrel. Machined from 4150 Chrome Moly Vanadium (CMV) steel and treated inside and out with a black nitride (QPQ) finish, this barrel is engineered for toughness, corrosion resistance, and easy maintenance. The carbine-length gas system on a 10-inch tube provides a distinct tuning profile that—when paired with the right buffer, spring, and muzzle device—can yield smooth, repeatable cycling in compact builds used for training, range work, or patrol-style configurations (where lawful).
Why Choose This Diamondback 10" 5.56 Barrel?
Compact, duty-ready construction: 4150 CMV steel is the benchmark for hard-use barrels—excellent heat tolerance and strength for high round counts.
Black Nitride (QPQ) finish: Increased surface hardness, exceptional rust resistance, and slick bore characteristics for faster cleanup and longer life.
Carbine-length gas on a short tube: A unique, performance-forward setup that can be tuned for reliability and manageable recoil with proper gas, buffer, and muzzle-device selection.
5.56 NATO chamber: Works with common 5.56 loads and (per typical 5.56 guidance) .223 Remington—always confirm with the manufacturer and ensure proper headspace.
AR-15 pattern compatibility: Drop-in for standard AR-15 uppers; ideal for compact free-float handguards and modern accessories.
Key Features at a Glance
Caliber: 5.56x45mm NATO
Length: 10 inches
Material: 4150 Chrome Moly Vanadium (CMV) steel
Treatment: Black Nitride (QPQ), inside & out
Gas System: Carbine-length
Platform: AR-15 pattern pistols/SBRs (where lawful)
Model: 556C10M50B8R
UPC: 815875019176
Finish/Color: Matte black nitride
Builder’s Note: Confirm twist rate, muzzle thread pitch, gas journal diameter (e.g., .750"), and barrel contour for your production run. These details help you select the correct gas block, muzzle device/suppressor mount, and bullet weights.
Performance Benefits You’ll Notice
Rigid, compact handling: The 10" length keeps weight forward low for quick sight transitions and nimble movement in confined spaces.
Cleaner, quicker maintenance: QPQ nitride reduces fouling adhesion and copper build-up; bores clean up faster after high round counts.
Consistency across strings: 4150 CMV plus nitride resists throat erosion, supporting stable velocities and group integrity over time.
Tunable reliability: Carbine gas on a short barrel can run exceptionally well when paired with the right buffer system, gas block (adjustable recommended), and muzzle device.
Ideal Use Cases
Compact AR builds where agility and reduced overall length are priorities
Training & range carbines focused on high reps and consistent function
Suppressed or unsuppressed setups (tune gas/buffer accordingly)
Vehicle, farm, or patrol-style roles (where lawful) that demand a durable, easy-to-maintain barrel
Build & Compatibility Checklist
Upper Receiver: Standard AR-15, 5.56 compatible
Bolt Carrier Group: Quality 5.56/.223 BCG properly headspaced
Gas Block & Tube: Carbine-length gas tube; verify gas journal diameter
Handguard: Short free-float handguard with clearance for your chosen muzzle device
Muzzle Device: Match thread pitch; consider a brake/comp or suppressor-ready mount tuned for short barrels
Buffer System: Heavier buffers and appropriate springs are recommended for smoother impulse
Installation Tips
Inspect & prep: Degrease the extension and gas journal; lightly oil mating surfaces.
Torque the barrel nut: Follow spec for your receiver system and verify gas tube alignment.
Align the gas block: Dimple/pin where appropriate; apply thread locker per manufacturer instructions.
Headspace check: Always verify with GO/NO-GO gauges before live fire.
Function test & tune: Validate lock-back on an empty mag; adjust gas and buffer weight—especially if using a suppressor.
Specifications
(Twist rate, muzzle thread, gas journal, and precise contour may vary by production. Confirm before ordering companion parts.)
Frequently Asked Questions
Q: Can I shoot .223 Remington through this barrel?
A: Most 5.56 NATO chambers accept .223 Rem. Always follow the manufacturer’s guidance, verify headspace, and choose quality ammunition.
Q: Why carbine-length gas on a 10" barrel?
A: It’s a performance-tunable setup. With an adjustable gas block, correctly weighted buffer/spring, and appropriate muzzle device, many builders achieve excellent reliability and a controllable recoil impulse.
Q: Is an adjustable gas block necessary?
A: Strongly recommended, especially if you shoot a mix of loads or plan to run a suppressor.
Q: How accurate is a 10" barrel?
A: Within its intended distances, very capable. Barrel length chiefly affects velocity; with quality ammo and a solid build, expect reliable short-to-mid-range precision.
Q: Legal considerations?
A: Know your federal, state, and local laws regarding barrel length, pistol vs. SBR classification, transport, and suppressor use before building or modifying any firearm.
Recommended Pairings
Adjustable gas block + carbine-length gas tube
Heavier buffer & tuned spring for smoother cycling
Low-profile free-float handguard for ergonomic accessory placement
Flash hider/comp/brake or suppressor interface (match thread pitch)
Micro red-dot or rugged prism optic for fast acquisition
SEO Keyword Ideas
Diamondback 10" 5.56 barrel, 4150 CMV black nitride barrel, carbine-length gas short barrel, AR-15 10 inch barrel 5.56, Diamondback 556C10M50B8R, 815875019176, QPQ nitride AR barrel, compact AR pistol/SBR barrel, durable 5.56 carbine barrel, Diamondback DB barrel 5.56
Shrink your build without compromising durability. The Diamondback DB 5.56x45mm NATO 10" Black Nitride 4150 CMV Barrel delivers tough materials, easier maintenance, and a tunable carbine-gas system for compact AR-15 projects that run hard and stay reliable.
The End
