*CONTACT US FOR A SPECIAL COUPON CODE*
Bear Creek Arsenal BC 15 5 56 NATO 16 Inch Parkerized M4 Barrel 1 7 Twist Carbine Length Gas System B556CM41617P
Product Description
The Bear Creek Arsenal BC-15 16" 5.56 NATO Parkerized M4 Barrel (MPN/SKU: B556CM41617P) is an essential, high-value replacement or custom build barrel engineered for AR-15 pattern rifles. Designed to deliver dependable accuracy and long-term durability, this barrel features a classic M4 contour profile with standard 1/2x28 muzzle threads to accept your favorite muzzle brakes, flash hiders, or sound suppressors.
Precision CNC-machined from 4150 Chrome Moly Vanadium (CMV) steel, the barrel is finished with a durable manganese phosphate (parkerized) coating. This surface treatment provides outstanding corrosion resistance, reduces glare, and protects the exterior against harsh environmental field conditions. The 1:7 twist rate is ideal for stabilizing popular medium-to-heavy grain projectiles (such as 62gr, 69gr, and 77gr 5.56 NATO / .223 Rem rounds) while maintaining exceptional performance with standard 55gr practice ammunition.
Chambered in 5.56 NATO with M4 feed ramps, this barrel reliably feeds both military spec 5.56 NATO and commercial .223 Remington cartridges. Built around a reliable carbine-length gas system, it accepts standard 0.750" gas blocks, making it a versatile foundation for duty, training, and custom workshop upper receiver assemblies.
Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits standard AR-15 upper receivers. Features a 0.750" gas block journal diameter, carbine-length gas port spacing, and 1/2x28 muzzle thread pattern. Chambered in 5.56 NATO (safely cycles both 5.56 NATO and .223 Remington ammunition).
- Perform a complete firearm safety check: drop the magazine, lock the bolt rearward, and visually/physically inspect the chamber to verify zero live rounds are present.
- Clean and inspect the upper receiver barrel extension socket and barrel extension threads, ensuring they are free of carbon and metal chips.
- Apply a thin coat of aero-grade anti-seize grease to the upper receiver barrel extension threads.
- Insert the barrel extension into the upper receiver, aligning the indexing pin into the upper receiver slot without forcing or twisting.
- Torque your barrel nut to manufacturer specification (typically 35 to 80 ft-lbs) using a dedicated armorer's wrench and torque wrench.
- Install a 0.750" low-profile or standard front sight gas block along with a carbine-length gas tube, verifying alignment over the gas port before torquing set screws or driving roll pins.
Key Features
- 16-Inch M4 Contour Profile: Classic profile balance offers a strong rigidity-to-weight ratio for tactical and sporting builds.
- 4150 Chrome Moly Vanadium Steel: Heavy-duty CMV steel construction ensures thermal stability and long barrel service life under rapid fire.
- 1:7 Twist Rate Stabilization: Optimized to stabilize medium-to-heavy 5.56 NATO projectiles ranging from 55gr to 77gr match loads.
- Heavy-Duty Parkerized Finish: Manganese phosphate coating provides high corrosion resistance and a non-reflective matte black appearance.
- 5.56 NATO Chamber w/ M4 Feed Ramps: Safely fires both 5.56 NATO and .223 Remington cartridges while ensuring smooth cartridge feeding.
- Standard 1/2x28 Muzzle Threading: Compatible with a vast array of standard AR-15 flash hiders, muzzle brakes, and suppressor mounts.
Product Specifications
- Brand: Bear Creek Arsenal
- Model/Series: BC-15 16" 5.56 NATO M4 Barrel
- MPN / SKU: B556CM41617P
- Length: 16 Inches
- Caliber / Chamber: 5.56 NATO
- Twist Rate: 1:7
- Gas System Length: Carbine Length
- Gas Block Journal Diameter: 0.750 Inches
- Muzzle Thread Pattern: 1/2x28 TPI
- Material: 4150 Chrome Moly Vanadium (CMV) Steel
- Finish: Manganese Phosphate (Parkerized)
- Barrel Profile: M4 Contour
- Weight: 28.0 oz (1.75 lbs)
- Country of Origin: USA
