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Faxon Firearms 20" .308 Win Rifle Length Heavy Fluted Barrel

Manufactured by Faxon Firearms
SKU: 10B810R20FHQ-5R-NP3
MPN: 10B810R20FHQ-5R-NP3
Manufactured by Faxon Firearms
3 Reviews

Out of Stock

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Faxon Machining engineers and manufactures components that are found everywhere. In theaters of combat, on the ocean floor, in cars, in aircraft, on the ISS, and on Mars. Now, they bring their engineering excellence to bear on providing new and innovative components for the AR-15 platform that set the standard for quality. Faxon Firearms, manufacturing strategic solutions for tactical problems.

Manufacturing of Faxon barrels begins and ends in their Cincinnati, Ohio facility under ISO 9001/9100 quality certifications. Each barrel they produce is fully stress relieved, air-gauge tested, and 11-degree target crowned to ensure superior accuracy.

Crafted from the best materials, either certified 4150 MIL-SPEC steel or 416R stainless, each barrel undergoes rigorous quality controls before QPQ finishing and final inspection. Once finished, each barrel is examined for proper headspace using precision custom hardened gauges.

NOTE: Faxon Firearms barrels are chambered to SAAMI specification .308 Winchester at a nominal headspace depth (passing "Go" and failing "No-Go").

  • DPMS compatible
  • Chambered in .308 Winchester with a 1:10 twist
  • 416R stainless steel
  • Rifle length gas system
  • Heavy profile
  • Fluted
  • 5/8x24 thread pitch
  • Gas seat diameter: 0.750"
  • QPQ nitride finish
  • 5R button rifled
  • Magnetic particle inspected
  • nickel Teflon LR-308 barrel extension
  • 11-degree target crown
  • Weight: 2.4 lbs
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Barrel CoatingQPQ Nitride
Barrel ContourHeavy
Barrel Length20
Barrel LiningQPQ Nitride
Barrel Material416R Stainless Steel
BrandFaxon Firearms
Caliber Gauge.308 Win
Compatible Make
Compatible Model
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthRifle
Thread Pattern5/8 X 24
Twist Rate1:10
Weight2.4 lbs
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

3 reviews

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5 stars!


I can not wait to install this barrel. First off, It was well packaged nicely inside a thick faxon zip lock, followed by hard cardboard poster tube on the outside. All of that inside a box itself to insure nothing gets damaged. I appreciate that Primary Arms. Once opened, the barrel is immaculate, not a scratch or a smudge on the barrel. No chips on the flutes or anything. I’ve read reviews on faxons website where this wasn’t the case. There are plastic protectors on both ends of the barrel. The engravings on the base and where the gas port is, are finely done. The chamber is clean and the ramps look great, no dings. Awesome looking barrel.

Good barrel for the price!


Well I originally wanted a kriger barrel for a precision build but couldn’t find anything in stock and costs 600+ if it were in stock. So I did some research and went with this barrel and honestly was concerned at first, it was putting 4in groupings at 25 yards with Bottom shelf m80 ball ammo made in the Philippines (40rds fired) then switched to some aac 150g fmj when I moved to 100yd and the first 3 shots taking my time were .5moa and then fired 17 more rounds pretty quickly and all landed within 3in. I moved on to some longer ranges and was getting pretty good accuracy out to 500yds with cheaper ammo (aac/armscore).. so once my barrel gets broken in I expect some great accuracy with good ammo. Overall a great barrel for the price just as long as their barrels are consistent.

Quality barrel with great performance.


Clean look inside and out even after 200 rounds. Precision machining shows in its lockup with the BCG and accuracy is fantastic. I paired this with a Cryptic Custom Midnight BCG and it’s my favorite build on the range.