Diamondback Firearms 7.62x39 AR-15 Barrel - Carbine - Nitride - 10"

Manufactured by Diamondback Firearms
SKU: 7.62X39C10M50B9.5
MPN: 7.62X39C10M50B9.5
Manufactured by Diamondback Firearms
22 Reviews

In Stock

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The National Firearms Act regulates the configurations of some firearms assembled with barrels under 16” long. Know the NFA laws in your state before purchasing this item.

The Diamondback Firearms 7.62x39mm AR-15 Carbine Barrel is machined in house on state-of-the-art CNC machines and are thoroughly inspected at multiple stages of the build process to ensure quality. This 10” barrel is machined from 4150 Chrome Moly Vanadium Steel and is 6 groove button rifled to ensure consistent accuracy and has a 1:9.5 twist rate. The carbine length gas system is optimal for reliability with a short 7.62x39mm barrel. It is threaded 5/8x24 and features an 11 degree target crown. The final process is a salt bath Nitride finish for an added layer of protection.


  • 10” barrel chambered in 7.62x39mm
  • Machined from 4150 CMV steel
  • Salt Bath Nitride finish
  • Carbine length gas system
  • 1:9.5 twist rate
  • 6 groove button rifled
  • 11 degree target crown
  • Threaded 5/8x24
See More


Barrel CoatingSalt Bath Nitride
Barrel ContourMedium
Barrel Length10
Barrel Material4150 Chrome Moly Steel
BrandDiamondback Firearms
Caliber Gauge7.62X39mm
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthCarbine
Thread Pattern5/8 X 24
Twist Rate1:9.5
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

22 reviews


Not impressed

by -

Build data:
Bear Creek side charging upper and BCG, Anderson lower with PSA EPT trigger, KAK shockwave buffer tube kit with a Strike Industries brace/blade, C-products 28rd 7.62x39 mags.

The good:
It's a fairly accurate barrel (1" groups at 50 yds). No failures to feed, fire or eject out of multiple C-products mags with Tula 122gr FMJ.

The bad:
It's a jam-o-matic with the Tula 124gr 8M3 HPs. It looks like the bottom lip of the HP is getting caught on the feed ramp as it chambers. Presentation angle from the magazine looks good, so it appears to be a problem with how the ramp and the HP tip are interacting. It occurs primarily with the right feed ramp (viewed from the butt).

I haven't had the chance to try SPs or other brands of HPs . I'm bummed that it doesn't like the primary ammo I hoard for my AK. It's hard for me to recommend it if it doesn't feed everything that it's presented with. Maybe the problem lies elsewhere, but doesn't look like it. YMMV.

Not great, not terrible.

by -

Barrel feed ramps needed modifying, which is/was a pain. 2.5moa @ 100yds with the cheap stuff, so not too upset about that. This was just a “fun” Corona quarantine project, so went with this cheap barrel, so kept my expectations realistic.

Update of my prior review.

by -

This is an update to my previous review.....

I have tried multiple FMJs and SPs with this Barrel and it feeds them fine. I continue to have a problem with HPs. I gave it 4 stars because in my previous review I gave it 2 stars. I actually believe it is a 3 star barrel ({2+4}/2 reviews). If it fed everything, I would give it a true 4 stars. If it fed everything and was 1 moa or better (it's 2 MOA for me), I'd give it 5 stars. Admittedly, the lack of 1MOA accuracy may be due to the ammo, not the barrel. YMMV.

Very impressed


Really impressed with this barrel also has nice twist rate and does not malfunction!

Very impressed


Great barrel does not malfunction and nice twist rate !

Great bang for my bucks!

by -

apprehensive about this bbl due to the previous review. It went on sale & I couldn't resist. I've built a few ARs now & this went together w/o issues. Range day & the 1st 20 rds got FTFs on every shot! I dimpled the bbl for the gas block so probably no chance at a refund. I put my silencer on just to see how x39 sounds compared to 5.56 & couldn't believe it fed & fired every round! maybe the gas port is too small? I'll try w/a lighter buffer & or lower rate buffer spring & see if it will run w/o the silencer. Best part is that I got .5" 25 yard groups using a red dot firing wolf 124 gr HP & Wolf classic 124 gr FMJs. I'll try w/a magnified optic & farther distances next time. Really happy w/the purchase even if I can't get it to run w/o the silencer.

Very impressed


After reading all bad reviews of 7.62x39 AR's in general i was a bit skeptical but given the price of ammo lately and the frequency i like to hit the range i gave it a try.
The first trip to the range i had 3 or 4 failures and i believe was a combination of magazines and breaking in of the BCG.
After that has ate everything i feed it. Red army standard, wolf, tula, xmatch. I usually shoot from 250-300 rounds per trip sometimes twice a week.
This barrel is paired to a PSA lower, no brand upper, seekins presicion gas block, rise armaments RA-434 trigger, prime weaponry BCG, surefire warden flash hider. It has become my favorite pistol with no malfunctions.
Gas port not small as other reviews for the same caliber. Highly recommended.


by -

work very good

Looks good so far


Looks good so far. Machine work seems solid. Chamber doesn't show any marks or grooves. Feed ramps are smooth. Nitriding is dark and even. I must have lost two grooves in the mail, though. Specs say 6 groove button rifled, but even with the new math I still only count 4. No biggie if it shoots OK. We'll find out soon enough.

barrel length correction

by -

just received my barrel today. the description claims this is a 10 inch barrel. what i received was 9.5 inches. beware when ordering a specific length handguard. I can still make what I ordered work by installing the muzzle device before the handguard goes on but if I want to make a change in the future now I will have to remove my hanguard to swap a muzzle device not ideal. will review to quality and reliability after the build.