5.56 20″ Heavy Barrel – Rifle Length

Rated 4.63 out of 5 based on 16 customer ratings
(16 customer reviews)


  • CALIBER: 5.56 NATO
  • TWIST RATE: 1:9
  • MATERIAL: 4150 Chrome Moly Vanadium
  • FINISH: Parkerized
  • GAS SYS: Rifle
  • MUZZLE THREAD: None-Target Crown
  • TREATMENT: Non & RF85
  • ADDITIONAL SPECS/NOTES: Barrel is compatible with .223 Ammunition.
  • Weight: 3.39 lbs
UPC: N/A 640901516646 640901516400 SKU: N/A Category: Tags: , , , , , , , , , ,

Additional information

Weight N/A
Dimensions N/A

Non-RF85, RF85 Treated

16 reviews for 5.56 20″ Heavy Barrel – Rifle Length

  1. Rated 5 out of 5


    Amazing accuracy for the price. Purchased this and a $450 Krieger DCM 20″ Stainless 1:7.7 target crown match barrel in 223 at the same time for a bench/target build and compared in the same upper.

    I was amazed that this barrel out shot it with cheap Hornady 55gr SP over 25.2gr (use at your own risk) Max charges of H335.

    It’s not QUITE a fair comparison since the Krieger was .750″ from the gas block forward whereas this is .936″ and an HBAR.

    I can get 5 shots into .35″ at 50 yards repeatedly and sometimes better. And it’s still not broken in yet (under 100 rounds through it).

    I tested the Krieger with 77gr Nosler HPBT Match and it did even a little better than that at around .32″ at 50 yards but of course that’s heavy match. I’m sure both barrels could do better with higher end parts and maybe a better shooter. But with all held constant, I felt it was a fair comparison and was very pleased with the price of this barrel for the accuracy it provides. I have a relative with a Browning A-Bolt in 308 and this will out shoot that by a long shot. Of course he uses factory ammo, but for what it’s worth, this is a very nice barrel.

    5 stars! 10 stars for the price if I could give it.

    Details on the setup used:
    -free float round tube upper (actually just a free float barrel nut with a 12.5″ piece of PVC pipe with a couple of slits to fit over the nut and hose clamp over that. Cheap and ugly but works GREAT!)
    -Anderson .936″ gas block (nice that it has 4 set screws)
    -Anderson rifle length gas tube
    -Lower with nice match trigger (smith tuned mil spec trigger)
    -Centerpoint 4-16×40 scope (may do better with a higher quality scope)

    Anyways, summary… great barrel. Very impressed. The ONLY downside I can see is that it’s heavy (add a pound vs a mil contour carbine 16″ barrel) and it’s a little nose heavy. But no problem for range shooting or even use in a deer stand. The accuracy is amazing!

  2. Rated 5 out of 5


    Is this barrel chambered in .223 or 5.56?

    • Tom Steffner


  3. Rated 5 out of 5


    Not really a review but I have no idea what the 11 degree target crown is. If anyone could give me an answer it would be greatly appreciated.

  4. Rated 4 out of 5


    Just received my barrel, haven’t even finished my build much less fired it but so far just as I expected from everything I’ve gotten from Anderson, super quick, as advertised, excellent quality and the best value I’ve found on the entire web. I feel it would be inappropriate to give a higher rating as I’ve not even fired the rifle. A small mar on the outside edge of the muzzle I suspect from the crazy Christmas shipping, should have no effect on accuracy and does not reflect on Anderson at all IMHO.

  5. Rated 5 out of 5


    Robert: 11′ target crown means that the outside edge of the end of the barrel where the bullet comes out (muzzle) is slightly higher than the bore hole – kind of funnel shaped. This protects the muzzle from dings that will reduce accuracy. The difference between a target crown and a standard (hunting) crown is that a target crown is “funnel” shaped where as a standard crown is a radius. Just for info, a target crown can be done on a lathe with any appropriate cutting tool, where a radiused crown has to be done with a special made tool. – Sam Beeman, GySgt., USMC Ordnance, Ret.

  6. Rated 5 out of 5


    Installed barrel on new build, standard size rifle with free float hand guard. Everything MIL-STD except for ACE skeleton stock and bug buster scope. took it to the range to test fire; after ” fire three rounds to see if i’m going to lose any fingers”, I shot a two inch group offhand at 75 yds in a crosswind. and that was with the scope not zeroed. That might not impress you, but it sure as heck impressed me. From here on, I’m always going to have one or two of these barrels in my parts locker -Sam Beeman, GySgt. USMC, Ret.

  7. Rated 5 out of 5


    Far exceeded expectations. Installed on my new build. Looks amazing and after 200 rounds down the tube I Han get 0.40 of an inch 10 round groups at 75 yrds and 0.25 inch 3 shot groups with cheap 55 grn American eagle 223. After sighting in barrel I was able to hit insane shots at squirrels 150 yards+ away behind the house to my family’s amazement.

  8. Rated 5 out of 5


    So I bought this with low expectations because of the price, went to the Range with it today and after sighting it in with my m223 scope I put 10 rounds thru a hole about 1″ diameter at 100 yards. For the price it doesn’t get much better than this. Hopefully it holds the same group after I put 1000 rds in it.

  9. Rated 4 out of 5


    Will this work with standard barrel but?

    • Michael Johnson

      yes it could if you use the rifle length handguards

  10. Rated 5 out of 5

    Jeffrey L Wilson

    First, GREAT barrel for the price. Do not buy if you are building a lightweight rifle. This barrel went on my 6th build and was designed to be a long range rifle. Barrel not completely broke in yet but after about 20 rounds (break in process) I had to check the accuracy. At 100 yards, getting 3/4″ groups with Federal XM193 standard 5.56 FMJ. Expecting 1/2′ – 5/8″ Groups with hand loads and barrel broke in. If you are planning on shooting a heavier bullet like a XM855 you might want to consider a barrel with a higher twist rate but I wanted to use the same ammo I use in my others so the 1:9 is perfect for me. Recoil is about 1/2 as much as a standard M4 style AR15. The heavier barrel mitigates about 1/2 the recoil. You can use a mil spec barrel nut but your mil spec front hand guard cap wont fit over the .936″ barrel so it will need to be modified but, I would suggest a free float instead which will come with its own barrel nut. A 12 inch free float will not cover the gas block but is perfect if you want a taller one with a rail on it. A 12′ free float is about 3/8′ behind the back of the gas block. If you want to cover it with a hand guard longer than 12″ you will need a low profile gas block to go under the hand guard but any .936 Anderson block will work with the 12″ hand guard. Excellent barrel, looks massive, shoots great. And, oh yea, the part you knew… Quick shipping, great packing and excellent service and quality.

  11. Rated 1 out of 5


    How much does this barrel weigh

    • Tom Steffner

      3.39 Lbs

  12. Rated 5 out of 5


    How much does the RF 85 make a difference. Been waiting for awhile for this barrel to come back into stock, but really want to finish my build.

    • Michael Johnson

      The RF85 will double the life of the barrel.
      Will keep it cooler and clean up is with soap and water.

  13. Rated 5 out of 5

    Mel Freitas

    I run this barrel very hard and brutal every weekend. Shot over five thousand rounds steel cased 55 gr FMJ TulAmmo sub moa at 100 yards with no issues what so ever, it runs like a tank. I would put this barrel up against any high end barrel out there and blow there doors off in a heart beat, that’s how good it really is. But most of all it looks really beefy and when shooters see it they get intimidated by the size of it. I was surprised the fit and finish is smooth no machine marks. I’m buying one more just to have one the side for another future build. I’m giving this barrel 5 stars, thank you Anderson for a awesome barrel.

    • Michael Johnson

      Thank you
      We are glad you like the barrel

  14. Rated 5 out of 5


    Great Barrel, like any barrel you have to see what gr. of bullet it likes best.
    Mine likes 45-55 so far, still testing.

  15. Rated 5 out of 5

    Sergio Flores

    Love this barrel! Was curious, will the rf85 treated barrel make the velocity faster because of the natural lubricity in the metal? Kinda like how the treated ar runs faster because of the treatment? Also would love to see a stainless or nitride version of this same barrel.

    • Michael Johnson

      It is 23% faster in the action

  16. Rated 5 out of 5

    robert cresswell

    really good shooter with factory ammo even better with hand loads.

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