Bergara Barrel AR-15 5.56x45mm NATO Heavy Contour 1 in 9" Twist 16" Nitride Finished Chrome Moly Black

Product #: 636004 Bergara #: BB16M4H9N-556 UPC #: 043125661091

Please Sign In to use this feature.

Product Information

All of Bergara's AR-15 Barrels are precision machined to the strictest of tolerances in order to produce the superior accuracy and performance for which Bergara Barrels are known. Bergara's 4-step barrel manufacturing process begins with a cylindrical bar of solid 4140 chrome moly steel that gets straightened to a tolerance spec of .004", deep drilled to the appropriate diameter, polished with 3 separate diamond-tipped honing spindles to a mirror finish, and then finally button rifled to the correct twist rate. This advanced machining technology and attention to detail results in an affordable production barrel that performs like one produced by custom shop at double the price. Each Bergara barrel comes with a manufacturer's guarantee that the customer will be 100 percent satisfied in terms of fit, finish and overall performance.

This barrel has been finished inside and out with a protective black nitride treatment that surface-hardens the metal, extending barrel service life by reducing friction in the bore and lessening bore surface wear. The salt bath nitride finishing process deposits an extremely hard, slick surface on steel that resists carbon adhesion and increases corrosion resistance, making for easier cleaning and maintenance. Nitriding converts the steel's surface without any build-up, retaining all of the benefits of traditional chrome lining without suffering the accuracy degradation commonly encountered with chrome due to its uneven application inside the barrel's bore.

This 16" AR-15 barrel features a true 5.56x45mm NATO chamber for use with both commercial and military surplus ammunition, while its 1 in 9" twist rifling is capable of stabilizing light to medium weight projectiles of up to about 69 grains. It comes equipped with a heavy carbine profile that is .980" diameter under the handguard and steps down to .744" diameter forward of the gas block. The muzzle is topped off with an 11 degree target crown and 1/2"-28 threading for the addition of a flash hider, muzzle brake or sound suppressor. This barrel is a great choice for shooters that can tolerate a little extra weight out front in return for the increased rate of fire that can be maintained before allowing the rifle time to cool. Barrel is fully chambered and includes a pre-installed barrel extension with M4 feed ramps and locator pin.

  • Length: 16"
  • Material: 4140 Chrome Moly Steel
  • Contour: Heavy Carbine
  • Chamber: 5.56x45mm NATO
  • Twist Rate: 1 in 9"
  • Chrome Lined: No
  • Finish: Black Nitride
  • M4 Feed Ramps: Yes
  • Muzzle Thread Pattern: 1/2"-28
  • Gas Port Location: Carbine
  • Exterior Diameter at Gas Port: 0.750"

Was this information helpful? Yes No

Thank you! Your valuable input helps improve our product information and future product selections

Please Help Us Improve

Please enter the missing required fields:

    Please describe why the information was not helpful.

    Do you accept our terms and conditions? *

    *Indicates a required field

    Know someone who may like this? Email this Page to a Friend

    Customer Reviews

    The statements and opinions expressed within Customer Reviews reflect each author's personal perspective and do not imply endorsement by MidwayUSA, its Employees or any other organization. Customers should in no way infer that MidwayUSA has validated review information as safe, accurate or appropriate.

    NOTE: Prices, specifications and availability are subject to change without notice.
    We reserve the right to correct typographic, photographic and/or descriptive errors.