Ballistic Advantage Modern Series 8" 5.56x45mm NATO Barrel — 4150 Chrome Moly Vanadium, Black QPQ, Pistol-Length Gas, DRP Profile for AR-15 | Model BABL556003M | UPC 819747020017

Compact Length. Big Performance.

Build a compact AR that doesn’t compromise with the Ballistic Advantage Modern Series 8" 5.56 NATO barrel. Precision-crafted from 4150 Chrome Moly Vanadium (CMV) steel and treated with a black QPQ (quench–polish–quench) finish, this barrel is engineered for long service life, excellent corrosion resistance, and consistent accuracy in a short package. The pistol-length gas system is tuned for reliable cycling with a wide range of ammunition, while BA’s DRP profile gives the contour stiffness and thermal efficiency that shooters demand from a hard-use barrel.

Whether you’re assembling a suppressed range blaster, a competition PCC-style AR (where allowed), or a compact training carbine, the Modern Series 8" brings legitimate, repeatable performance to the shortest 5.56 builds.

Key Features at a Glance

• Caliber: 5.56x45mm NATO — run 5.56 NATO and .223 Rem (as appropriate)

• Length: 8 inches — compact, maneuverable, suppressor-friendly overall length

• Material: 4150 CMV steel for strength and durability under heat

• Finish: Black QPQ nitride inside & out for wear and corrosion resistance

• Gas System: Pistol-length for reliable cycling in short builds

• Profile: DRP contour for balanced rigidity and heat management

• Compatibility: AR-15 pattern uppers; standard accessories and handguards

• Model / UPC: BABL556003M / 819747020017

Note: Typical 5.56 AR barrels are threaded 1/2x28; verify exact thread spec and gas journal size with the manufacturer for your specific lot.

Why Builders Choose the Modern Series 8"

QPQ Durability You Can Feel

QPQ nitride diffuses into the steel, creating a hard, low-friction surface that resists corrosion, cleans easily, and stands up to sustained strings of fire and frequent suppressor use.

4150 CMV for Hard Use

The alloy of choice for serious AR barrels, 4150 CMV maintains structural integrity at temperature and keeps sear surfaces and rifling geometry stable round after round.

Short, Suppressor-Ready Balance

The 8" length helps maintain practical velocity while keeping your overall length manageable—especially when you add a can. The pistol gas system is the proven standard for short 5.56 builds.

DRP Profile Confidence

BA’s DRP contour was developed to provide the stiffness short barrels need without extra weight. Expect consistent harmonics and predictable POI through heat cycles.

Ideal Use Cases

• Compact AR Pistols / SBRs (where legal): Superb maneuverability in close spaces and vehicles.

• Suppressed Builds: Short OAL with gas timing that pairs well with modern suppressors.

• Training & Home Range: Durable finish and rifling to handle high-volume practice.

• 3-Gun / Action Carbine Side Stages: Quick transitions and easy handling in tight arrays.

Builder-Friendly Details

• Heat-Resistant Finish: QPQ mitigates throat erosion and simplifies cleanup.

• Reliable Gas Timing: Pistol-length gas is the go-to for 5.56 barrels under ~10.5".

• Drop-In Compatibility: Works with standard AR-15 uppers and handguard systems.

• Quality Control: Ballistic Advantage barrels are known for consistent headspace and fit.

Technical Specifications (BABL556003M)

• Series: Modern Series

• Caliber: 5.56x45mm NATO

• Length: 8 inches

• Material: 4150 Chrome Moly Vanadium steel

• Finish: Black QPQ (inside and out)

• Gas System: Pistol-length

• Profile: DRP (Ballistic Advantage contour)

• Platform: AR-15

• Model Number: BABL556003M

• UPC: 819747020017

Specification notes: Features such as muzzle thread, gas journal diameter, and feed ramp style are commonly standardized on 5.56 AR barrels but may vary by production. Always confirm compatibility with your chosen gas block, muzzle device, BCG, and upper receiver.

Installation & Safety

• Verify Clear: Ensure the firearm is unloaded before work begins.

• Proper Torque & Alignment: Use a quality reaction device, torque wrench, and correct barrel nut torque specs; time the gas tube channel precisely.

• Headspace & Function Checks: Confirm headspace with proper gauges and test cycling with your intended ammo/suppressor setup.

• Gunsmith Recommended: If you’re new to AR barrel installs, consult a qualified armorer.

Care & Maintenance Tips

• Break-In: Modern nitrided barrels generally require little to no break-in; verify your preferred procedure.

• Cleaning: Use quality bore solvents and nylon/bronze brushes; avoid overly aggressive abrasives.

• Heat Management: Allow reasonable cool-downs during extended strings for best accuracy retention.

• Thread Care: Apply appropriate muzzle device shims/crush washer and torque; add anti-seize if recommended.

SEO-Rich Highlights & Buyer Keywords

• Ballistic Advantage Modern Series 8" 5.56 NATO barrel

• 4150 CMV black QPQ nitrided AR-15 barrel

• Pistol-length gas system with DRP profile

• Compact AR-15 barrel 5.56 for suppressed builds

• BABL556003M, UPC 819747020017

Frequently Asked Questions

Q: Can this barrel run both 5.56 NATO and .223 Rem?
A: Yes—5.56 NATO chambers are designed to safely fire 5.56 NATO and .223 Rem (use quality ammunition and always follow manufacturer guidance).

Q: What gas block size do I need?
A: Gas journal diameters can vary by model/lot. Check the manufacturer’s listing for the exact size before ordering a gas block.

Q: Is nitride better than chrome lining?
A: QPQ nitride provides excellent corrosion resistance and wear protection with uniform bore dimensions. Many shooters prefer nitride for accuracy and ease of cleaning.

Q: Will this cycle reliably with a suppressor?
A: The pistol-length gas system is the standard for short 5.56 barrels and is commonly compatible with suppressed setups. Tuning (buffer, spring, gas) may be required based on your parts and ammo.

Meta Title (SEO)

Ballistic Advantage Modern Series 8" 5.56 NATO Barrel — 4150 CMV, Black QPQ, Pistol Gas, DRP Profile | BABL556003M

Meta Description (SEO)

Build a compact, reliable AR-15 with the Ballistic Advantage Modern Series 8" 5.56x45mm NATO barrel. 4150 CMV steel, black QPQ finish, pistol-length gas, DRP profile. Model BABL556003M, UPC 819747020017.

Structured Data (Product Schema JSON-LD)

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Responsible Use Reminder

Follow all local, state, and federal laws. Observe NFA rules for SBR configurations, and verify compatibility and headspace before live fire. Practice safe handling at all times.

The End