Diamondback DB Barrel — 7.62x39mm, 16" Carbine-Length, Black Nitride, 4150 Chrome Moly Vanadium Steel | Model 762X39C16M50B95R (UPC: 815875019091)
Build a rugged, hard-hitting AR-pattern carbine with the Diamondback DB 7.62x39mm 16" Barrel. Precision-machined from 4150 Chrome Moly Vanadium (CMV) steel and treated inside and out with a black nitride (QPQ) finish, this barrel delivers the durability, corrosion resistance, and easy maintenance serious shooters demand. The carbine-length gas system pairs with the widely available 7.62x39mm cartridge to produce a compact, highly functional setup for training, ranch use, and practical carbine builds—while keeping parts compatibility within the AR ecosystem.
Why Choose This Diamondback 16" 7.62x39 Barrel?
Proven 4150 CMV construction: Duty-grade steel resists heat and erosion under sustained fire, supporting consistent velocities over long service life.
Black Nitride (QPQ) finish: Hard, corrosion-resistant surface reduces copper/carbon fouling for quicker clean-up and better long-term accuracy retention.
Carbine-length gas system: A popular, well-supported gas length that’s straightforward to tune for a wide range of ammo and use cases.
7.62x39mm chamber: Take advantage of this cartridge’s robust energy and affordable availability while keeping AR ergonomics, controls, and modularity.
AR-15 pattern compatibility: Designed for AR-15 receivers with x39-specific bolt and magazines, ensuring an accessible, upgrade-friendly build path.
Key Features at a Glance
Caliber: 7.62x39mm
Barrel Length: 16 inches
Material: 4150 Chrome Moly Vanadium (CMV) steel
Treatment: Black Nitride (QPQ), inside & out
Gas System: Carbine-length
Platform: AR-15 pattern (x39 bolt and mags required)
Model: 762X39C16M50B95R
UPC: 815875019091
Color/Finish: Matte black nitride
Builder’s note: Confirm twist rate, muzzle thread pitch, gas journal diameter (e.g., .750"), and barrel contour for your specific production run to ensure proper pairing with gas blocks, muzzle devices/suppressor mounts, and preferred bullet weights.
Performance Benefits You’ll Notice
Reliable energy on target: 7.62x39mm is known for delivering strong terminal performance from compact carbines—ideal for ranch, utility, and practical range roles.
Consistent cycling potential: Carbine gas length is broadly supported with parts and knowledge, making it simpler to tune for varied ammunition, including steel and brass x39 loads.
Easier maintenance: QPQ nitride reduces fouling adhesion inside the bore, slashing scrubbing time after high-round-count sessions.
Heat & throat wear resistance: 4150 CMV plus nitride treatment helps mitigate erosion for steady velocities and group stability across seasons.
Ideal Use Cases
All-purpose carbines for training and range days
Ranch & utility rifles where stout energy and reliability matter
Budget-friendly practice builds leveraging readily available 7.62x39 ammo
Suppressor exploration (tune with an adjustable gas block and the right muzzle device, where lawful)
Build & Compatibility Checklist
Upper Receiver: Standard AR-15 pattern
Bolt Carrier Group: 7.62x39-specific bolt (proper extractor/bolt face); properly headspaced
Magazines: AR-15 x39-compatible magazines for reliable feeding
Gas Block & Tube: Carbine-length gas tube; verify gas journal diameter (commonly .750")
Handguard: Free-float recommended for accuracy and accessory placement
Muzzle Device: Match thread pitch to device or suppressor interface (verify spec)
Buffer System: Tune buffer weight and spring for your load and configuration (especially if suppressed)
Installation Tips
Inspect & prep: Degrease the barrel extension and gas journal; lightly oil mating surfaces.
Torque & align: Install the barrel nut to spec; confirm gas tube clearance and alignment.
Set the gas block: Align with the port; dimple/pin as appropriate and apply thread locker per instructions.
Headspace check: Always verify with GO/NO-GO gauges using your x39 bolt.
Function test & tune: Validate ejection pattern and last-round bolt hold-open; adjust gas/buffer as needed (especially with mixed steel/brass loads or a suppressor).
Specifications
Caliber: 7.62x39mm
Length: 16"
Material: 4150 CMV steel
Finish: Black Nitride (QPQ)
Gas System: Carbine-length
Platform: AR-15 (x39 bolt & mags required)
Model #: 762X39C16M50B95R
UPC: 815875019091
(Twist rate, muzzle threading, gas journal diameter, and exact contour may vary by production; confirm details before purchasing companion parts.)
Frequently Asked Questions
Q: Will this work with my standard AR-15 bolt and mags?
A: You’ll need a 7.62x39-specific AR bolt and x39 AR magazines for reliable feeding and extraction.
Q: Is an adjustable gas block necessary?
A: Not mandatory, but highly recommended—especially if you plan to run mixed ammunition types or a suppressor.
Q: How accurate is 7.62x39mm from a 16" barrel?
A: With quality ammo and proper build tuning, expect dependable practical accuracy for its intended ranges; barrel length primarily influences velocity, not intrinsic precision.
Q: Can I use steel-cased ammunition?
A: Many shooters do. Ensure a properly tuned gas system, quality magazines, and routine extractor maintenance for best results.
Q: Legal considerations?
A: Always follow federal, state, and local laws regarding configurations, muzzle devices, and suppressor use.
Recommended Pairings
Adjustable gas block + carbine gas tube for fine-tuning
Robust x39 BCG with enhanced extractor
Free-float M-LOK handguard for accessories and harmonics
Quality muzzle device or suppressor interface (verify thread)
Durable prism or red-dot optic for quick target acquisition
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Harness the punch of 7.62x39mm in a reliable AR platform. The Diamondback DB 16" Black Nitride 4150 CMV Barrel delivers durability, easy maintenance, and carbine-length tunability—an ideal foundation for practical carbines that run hard and stay consistent.
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