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Discover the BRN-4 5.56mm barrels, featuring heavy or medium profiles, 1-7 twist, nitride finish, and compatibility with HK® 416 components for versatile performance.

BROWNELLS BRN-4 5.56MM 10.4" 1-7 TWIST HEAVY NITRIDE BARREL

050806500709 080001439

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Variations
Filters:
Variations:

Variations:

Cartridge: 5.56 x 45 Contour: Heavy Finish: Black Nitride Gas System Length: 416 Length: 10.4'' Make: Heckler & Koch, Brownells Model: BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001439
Not available
304.9 GBP 0 £304.90 *
Cartridge: 5.56 x 45 Contour: Medium Finish: Black Nitride Gas System Length: 416 Length: 10.4'' Make: Heckler & Koch, Brownells Model: HK416, MR556, BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001440
In stock
279.9 GBP 102 £279.90 *
Cartridge: 5.56 x 45 Contour: Heavy Finish: Black Nitride Gas System Length: 416 Length: 14.5'' Make: Heckler & Koch, Brownells Model: HK416, MR556, BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001441
In stock
279.9 GBP 319 £279.90 *
Cartridge: 5.56 x 45 Contour: Medium Finish: Black Nitride Gas System Length: 416 Length: 14.5'' Make: Heckler & Koch, Brownells Model: HK416, MR556, BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001442
In stock
279.9 GBP 558 £279.90 *
Cartridge: 5.56 x 45 Contour: Heavy Finish: Black Nitride Gas System Length: 416 Length: 16'' Make: Heckler & Koch, Brownells Model: HK416, MR556, BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001443
In stock
279.9 GBP 248 £279.90 *
Cartridge: 5.56 x 45 Contour: Medium Finish: Black Nitride Gas System Length: 416 Length: 16'' Make: Heckler & Koch, Brownells Model: HK416, MR556, BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001444
In stock
284.9 GBP 650 £284.90 *
279.9 304.9 6 GBP
304.9 GBP £304.90

Prices inclusive of duty & VAT.

Product no.: 080001439

Mfr. No.: BN-BRN4556-10.4

050806500709 Brownells BRN-4 HK® 416 compatible barrels, available in a variety of lengths and two contours. Historically extremely hard to procure, HK® 416 compatible barrels are now available as part of the BRN-4 lineup. These barrels machined by Faxon, fit early generations of HK® 416 upper receivers and components. They are the perfect fit with the BRN-4 bolt carrier group and gas block (search “BRN-4” for all parts). Available in common barrel lengths of 10.4, 14.5 and 16 inch, these barrels are suitable for any need. You can select the classic “heavy” profile, which is similar to the profile found on earlier HK® 416 models, ensuring barrel rigidity with minimal flex, or you can pick the new “medium” profile, which saves weight and makes the rifle quite handy. Barrels are button rifled with a 1-7 twist and have commonly used ½-28 muzzle threads for the attachment of the muzzle device of your choice. A deep black nitride finish provides an extremely hard exterior and interior, that is easy to clean. The longer barrel extension of the BRN-4 allows for a robust matchup to the upper receiver, and a simple install with the BRN-4 barrel nut (430-100-141). 5.56x45mm NATO chamberings allow for a wide variety of commercially found ammunition to function, as well as 223 Remington cartridges. No need to worry about picking the right gas system length, as all of these barrels have the same piston rod assembly (078-000-644), just be sure to pick the correct BRN-4 gas block to match your overall barrel length, 078-000-708 & 078-000-709). Be sure to pick up the gas block coil pins for final assembly as well (430-103-127). Recommended Barrel Nut Torque: 50-80 ft/lbs.
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279.9 304.9 6 GBP
Description Specification Customers reviews Accessories

BROWNELLS BRN-4 5.56MM 10.4" 1-7 TWIST HEAVY NITRIDE BARREL

304.9 GBP £304.90

Prices inclusive of duty & VAT.

Is a 'Call to order' product.

Description:

Introducing the BRN-4 Barrels – Precision and Performance for Your Firearm

The Brownells BRN-4 is a line of HK® 416 compatible barrels, now available in various lengths and contours, making them a must-have for any firearms enthusiast.

Product Features:

  • Compatibility: Designed to fit early generations of HK® 416 upper receivers and components.
  • Barrel Lengths: Available in 10.4", 14.5", and 16" lengths to suit any shooting need.
  • Profiles: Choose between the classic “heavy” profile for rigidity or the new “medium” profile for a lighter, more handy rifle.
  • Twist Rate: Button rifled with a 1-7 twist for enhanced accuracy.
  • Muzzle Threads: Commonly used ½-28 threads for easy attachment of your preferred muzzle device.
  • Finish: Deep black nitride finish ensuring a hard exterior and interior that is easy to clean.
  • Barrel Extension: Longer barrel extension for a robust match to the upper receiver and easy installation with the BRN-4 barrel nut (430-100-141).
  • Chambering: 5.56x45mm NATO compatible, allowing for a wide variety of commercially available ammunition, as well as .223 Remington cartridges.
  • Gas System: All barrels feature the same piston rod assembly (078-000-644), simplifying the selection of the correct gas block (078-000-708 & 078-000-709).
  • Final Assembly: Remember to pick up the gas block coil pins (430-103-127) for final assembly.
  • Recommended Torque: Barrel nut torque should be between 50-80 ft/lbs.

With the Brownells BRN-4 barrels, you can ensure that your firearm not only meets but exceeds your expectations in performance and reliability.



Restrictions

  • Is a 'Call to order' product.

Top takeaways

  1. Brownells BRN-4 barrels are HK® 416 compatible, available in heavy and medium profiles, and come in lengths of 10.4, 14.5, and 16 inches.
  2. These barrels are button rifled with a 1-7 twist, have a black nitride finish, and feature ½-28 muzzle threads for attaching various devices.
  3. The barrels are designed for easy installation with the BRN-4 barrel nut and are chambered in 5.56x45mm NATO, also accommodating .223 Remington cartridges.

Attributes

  • Cartridge:
    5.56 x 45
  • Contour:
    Heavy
  • Finish:
    Black Nitride
  • Gas System Length:
    416
  • Length:
    10.4''
  • Model:
    BRN-4
  • Muzzle Threads:
    1/2-28
  • Twist:
    1-7
  • Weapon type:
    Brownells
    ,
    Heckler & Koch
  • Delivery weight: 0.522kg
  • Shipping height: 25mm
  • Shipping width: 25mm
  • Shipping length: 286mm
  • UPC: 050806500709

Item details

Made in USA
US export classification: 0A501.c

Customers reviews

Customer ratings (0)

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Variations:

Cartridge: 5.56 x 45 Contour: Heavy Finish: Black Nitride Gas System Length: 416 Length: 10.4'' Make: Heckler & Koch, Brownells Model: BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001439
Not available
304.9 GBP 0 £304.90 *
Cartridge: 5.56 x 45 Contour: Medium Finish: Black Nitride Gas System Length: 416 Length: 10.4'' Make: Heckler & Koch, Brownells Model: HK416, MR556, BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001440
In stock
279.9 GBP 102 £279.90 *
Cartridge: 5.56 x 45 Contour: Heavy Finish: Black Nitride Gas System Length: 416 Length: 14.5'' Make: Heckler & Koch, Brownells Model: HK416, MR556, BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001441
In stock
279.9 GBP 319 £279.90 *
Cartridge: 5.56 x 45 Contour: Medium Finish: Black Nitride Gas System Length: 416 Length: 14.5'' Make: Heckler & Koch, Brownells Model: HK416, MR556, BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001442
In stock
279.9 GBP 558 £279.90 *
Cartridge: 5.56 x 45 Contour: Heavy Finish: Black Nitride Gas System Length: 416 Length: 16'' Make: Heckler & Koch, Brownells Model: HK416, MR556, BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001443
In stock
279.9 GBP 248 £279.90 *
Cartridge: 5.56 x 45 Contour: Medium Finish: Black Nitride Gas System Length: 416 Length: 16'' Make: Heckler & Koch, Brownells Model: HK416, MR556, BRN-4 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 080001444
In stock
284.9 GBP 650 £284.90 *

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