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The Brownells BRN-4 10.4" barrel offers HK® 416 compatibility, a durable black nitride finish, and a lightweight medium profile for enhanced handling.

BROWNELLS BRN-4 STRIPPED BARREL,10.4" MEDIUM, 1-7, 1/2"-28,BLK NITRIDE

050806500716 080001440

Filters:

Variations
Filters:
Variations:

Variations:

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: 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: 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 309 £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 553 £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
279.9 GBP £279.90

Prices inclusive of duty & VAT.

Product no.: 080001440

Mfr. No.: BN-BRN4556-10.4M

050806500716 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.
In stock More than 10 pieces in USA warehouse

Delivery time approx. 7-14 days.

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279.9 304.9 6 GBP
Description Specification Customers reviews Accessories

BROWNELLS BRN-4 STRIPPED BARREL,10.4" MEDIUM, 1-7, 1/2"-28,BLK NITRIDE

279.9 GBP £279.90

Prices inclusive of duty & VAT.

Is a 'Call to order' product.

Description:

Discover the precision and performance of the BRN-4 Barrels from Brownells.

The Brownells BRN-4 BARRELS 5.56X45MM offers exceptional compatibility with HK® 416 platforms, now available in various lengths and contours to meet your shooting needs.

Key Features:

  • Compatible with early generations of HK® 416 upper receivers and components.
  • Machined by Faxon for superior quality and performance.
  • Available in common barrel lengths: 10.4, 14.5, and 16 inches.
  • Choose between a classic heavy profile for rigidity or a medium profile for a lightweight feel.
  • Button rifled with a 1-7 twist for enhanced accuracy.
  • Features ½-28 muzzle threads for easy attachment of your preferred muzzle device.
  • Deep black nitride finish for durability and ease of cleaning.
  • Longer barrel extension for robust fit with upper receivers.
  • 5.56x45mm NATO chambering compatible with a wide range of ammunition, including .223 Remington cartridges.

No need to worry about gas system length as all barrels come with the same piston rod assembly. Ensure you select the correct BRN-4 gas block to match your barrel length, with options available (078-000-708 & 078-000-709). Don't forget to acquire the gas block coil pins for final assembly (430-103-127).

Recommended Barrel Nut Torque: 50-80 ft/lbs.

Upgrade your shooting experience with the Brownells BRN-4 BARRELS, designed for reliability and performance in every shot.



Restrictions

  • Is a 'Call to order' product.

Top takeaways

  1. Brownells BRN-4 barrels are compatible with HK® 416, machined by Faxon, and come in 10.4", 14.5", and 16" lengths with "heavy" or "medium" profiles.
  2. These 5.56x45mm NATO barrels feature a 1-7 twist, ½-28 muzzle threads, and a durable black nitride finish, suitable for both military and commercial ammunition.
  3. Installation is streamlined with a longer barrel extension, BRN-4 barrel nut, and requires the correct BRN-4 gas block and gas block coil pins for the chosen barrel length.

Attributes

  • Cartridge:
    5.56 x 45
  • Contour:
    Medium
  • Finish:
    Black Nitride
  • Gas System Length:
    416
  • Length:
    10.4''
  • Model:
    BRN-4
    ,
    MR556
    ,
    HK416
  • Muzzle Threads:
    1/2-28
  • Twist:
    1-7
  • Weapon type:
    Brownells
    ,
    Heckler & Koch
  • Delivery weight: 0.499kg
  • Shipping height: 25mm
  • Shipping width: 25mm
  • Shipping length: 286mm
  • UPC: 050806500716

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: 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: 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: 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 309 £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 553 £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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