CMC Triggers 5.56 NATO Barrel — 7.50" Chrome Moly Vanadium, Button-Rifled (BBL556001)

Build a compact, hard-running AR with the CMC Triggers 7.50" 5.56 NATO barrel. Precision button-rifled from chrome moly vanadium (CMV) steel, this short barrel delivers dependable accuracy, fast handling, and rugged longevity for AR-15 pistols, braced builds (where legal), and SBR projects. Whether you’re assembling a lightweight truck gun, a compact range blaster, or a suppressed CQB setup, CMC’s manufacturing quality gives you the repeatable performance your build deserves.

Model / SKU: BBL556001 | UPC: 850040016925
Caliber: 5.56 NATO | Barrel Length: 7.50"
Construction: Chrome Moly Vanadium (CMV) steel | Rifling: Button-rifled

Why Choose the CMC 7.5" CMV 5.56 Barrel

• Duty-Grade CMV Steel: Chrome moly vanadium is a proven barrel steel for heat resistance, durability, and throat life, especially in high-volume, short-barrel applications.

• Button-Rifled Precision: Button rifling provides an excellent balance of accuracy and consistency, ideal for compact carbines and pistol-length builds.

• Compact, Fast-Handling Length: At 7.50 inches, this barrel is tailor-made for CQB maneuverability, vehicle deployment, and tight indoor ranges while still feeding reliably with quality ammo.

• 5.56 NATO Chambering: Run 5.56 NATO and .223 Rem (SAAMI-spec) safely; the NATO chamber handles duty loads and higher pressures with confidence.

• Ready for Modern Accessories: Standard AR muzzle devices and gas system components (see notes below) make it easy to integrate brakes, comps, flash hiders, and suppressor mounts.

Note: Exact specs like gas system length, muzzle threads, and finish may vary by production run. Most 7.5" 5.56 barrels use pistol-length gas and 1/2x28 threads; verify your barrel’s listing/label for these details.

Key Features at a Glance

• Length: 7.50" compact profile

• Caliber: 5.56 NATO (compatible with .223 Rem)

• Material: CMV (chrome moly vanadium) steel

• Rifling Method: Button-rifled for consistent bore finish

• Intended Platform: AR-15 pattern receivers

• Model / SKU: BBL556001

• UPC: 850040016925

Real-World Advantages

• Quick Target Transitions: The short length keeps the rifle lively for rapid strings and tight target arrays.

• Reliable Cycling: Paired with the correct gas system and buffer setup, short barrels can run smoothly with a variety of 5.56 loads.

• Suppressed-Build Friendly: Compact OAL lets you add a suppressor while keeping length manageable (confirm gas tuning and ammo choice for best results).

• Durability for High Round Counts: CMV construction and CMC’s precision processes support long service life under training heat.

Ideal Use Cases

• AR Pistol / SBR (where legal) for home defense, vehicle carry, and CQB training

• PCC-style matches with rifle divisions permitting 5.56 short barrels

• Suppressed range setups seeking compact overall length

• Truck/utility builds needing quick deployment and storage

Setup & Compatibility Tips

1. Gas System: Most 7.5" 5.56 builds use pistol-length gas. Verify gas length and port size, and tune with buffer/spring to your ammo (especially if suppressed).

2. Muzzle Threads: Expect 1/2x28 in most cases; confirm before ordering muzzle devices or suppressor mounts.

3. Bolt Carrier Group: Use a quality, properly headspaced 5.56/.223 BCG.

4. Handguard Fit: Ensure handguard length clears your chosen muzzle device and gas block (set-screw or clamp-on).

5. Zero & Dope: Short barrels produce lower velocities; re-confirm your zero and holds for defensive and training distances.

Maintenance & Care

• Break-In: Not mandatory for button-rifled barrels, but a short, clean/foul cycle can help initial copper settling.

• Cleaning: Run a solvent patch and nylon/bronze brush as needed; avoid over-cleaning that can wear the crown or throat.

• Torque & Alignment: Install the barrel extension and nut with proper torque and anti-seize; ensure gas block alignment is true to prevent cycling issues.

• Crown Protection: Use a bore guide and clean from chamber to muzzle to preserve accuracy.

Safety & Compliance

• NFA Laws: If you configure this barrel on a rifle lower with a stock and the OAL is <16", it may be classified as an SBR. Follow all federal, state, and local regulations.

• Ammo Choice: Use factory, in-spec 5.56/.223. Over-gassed setups or hot ammo in very short barrels can increase wear—tune accordingly.

• Hearing Protection: 7.5" 5.56 is loud and concussive—double up ear pro, especially indoors; consider a flash can or suppressor (where legal).

Specifications

• Brand: CMC Triggers

• Product: 5.56 NATO Barrel

• Length: 7.50"

• Material: Chrome Moly Vanadium (CMV) steel

• Rifling: Button-rifled

• Platform: AR-15

• SKU: BBL556001

• UPC: 850040016925

(For exact twist rate, gas system length, muzzle thread, profile, and surface finish, consult the product label or retailer’s full spec sheet for this specific lot.)

SEO Keywords & Phrases

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Final Take

For builders who want compact size without compromising materials or machining, the CMC Triggers 7.50" 5.56 NATO CMV barrel (BBL556001) is a standout foundation. Button-rifled for consistency and crafted from chrome moly vanadium steel, it’s a reliable heart for AR-15 pistols, SBRs (where legal), and suppressed CQB rigs that demand fast handling and durable performance.

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