Guntec USA 9mm Barrel - 5.5"

Manufactured by Guntec USA
SKU: BAR-5.5-9
MPN: BAR-5.5-9
Manufactured by Guntec USA
1 Review

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NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.



All NFA and local laws apply, make sure you know them before ordering or installing this barrel.

Guntec USA has been designing, manufacturing, and distributing tactical weapon accessories since 1989. Their goal is to supply excellent quality, at an economical value to professionals and enthusiasts alike.

A quality barrel doesn't have to break the bank. Guntec USA proves this with their line of accurate barrels for the AR9. Machined from 4150 chromoly steel blanks, this barrels have been cut to a handy straight contour to provide an excellent balance between lightweight and thermal stability. Equipped with a proper 9mm chamber, this barrel will make a fantastic addition to your next build.

  • 5.5" 4150 Chromoly Steel barrel
  • Straight contour
  • Straight blowback
  • 1:10 twist rate
  • 9mm Luger chamber
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Barrel CoatingSalt Bath Nitride
Barrel ContourStraight
Barrel Length5.5
Barrel LiningSalt Bath Nitride
Barrel Material4150 Chrome Moly Steel
BrandGuntec USA
Caliber Gauge9mm Luger
Gas Seat Diameter.750
Gas System LengthBlowback
Thread Pattern1/2 X 36
Twist Rate1:10

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

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Checked this barrel before installing it. Their crowning tool must be dull. Heavy burring all around the crown. Finish inside the bore is very rough. Looking for guidance from Primary Arms. Exchange for Spikes?