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7.62x39 AR-15 Parts, Barrels, Uppers & BCGs

Run AK ammo through an AR. AllGoOperators stocks the 7.62x39 barrels, complete upper receivers, side-charging bolt carrier groups and 5/8x24 muzzle devices that turn a standard AR-15 lower into a reliable 7.62x39 rifle or pistol. In stock and ready to ship.

Shop By Build Stage

Every 7.62x39 Part, In Build Order

A 7.62x39 AR shares the lower, trigger, stock and buffer with a 5.56 rifle. What changes is the upper: barrel, bolt and muzzle thread. We have sorted the catalog by what you need to swap.

01

Complete 7.62x39 Uppers

The fastest route. Our 10.5" upper pairs a parkerized heavy barrel with a 1:10 twist and carbine-length gas for a pistol or SBR build, and the 16" side-charging upper runs a 416R stainless barrel for a rifle-length carbine. Both pin to any mil-spec AR-15 lower.

10.5" 7.62x39 Upper 16" Side Charging Upper All Complete Uppers
02

7.62x39 Barrels

Building your own upper? The 10.5" barrel is the pistol and SBR choice, and the 18" mid-length gas barrel in 4150 chrome moly vanadium with a 1:10 twist gives a smooth-cycling rifle. Both are parkerized and threaded 5/8x24.

10.5" 7.62x39 Barrel 18" Mid-Length Barrel All AR-15 Barrels Gas System Parts
03

7.62x39 Bolt Carrier Groups

The bolt face is the part most builders forget. A 7.62x39 case head is larger than 5.56 and needs a dedicated bolt. Our 7.62x39 side-charging BCG and the MPI-tested 7.62x39 BCG are cut for the case and finished for the extra pressure of steel-cased ammo.

7.62x39 Side Charging BCG 7.62x39 MPI BCG All Bolt Carrier Groups
04

Muzzle Devices & Feed

7.62x39 AR barrels are threaded 5/8x24, the same as .308. Finish the muzzle with our stainless breacher compensator or another 5/8x24 device, then feed the rifle with magazines built for the tapered 7.62x39 case.

5/8x24 Breacher Compensator 5/8x24 Muzzle Devices AR-15 Magazines AR-15 Triggers
7.62x39 Anatomy

What Changes vs. 5.56

The AR-15 lower is caliber-agnostic. Every change lives in the upper receiver group and the magazine.

Swap

Caliber-Specific

  • Barrel 7.62x39 chamber, .311 bore, 1:10 twist, 5/8x24 muzzle thread.
  • Bolt Larger bolt face for the .447 case head; extractor tuned for steel cases.
  • Magazine Curved 7.62x39 mags that fit a standard AR-15 magwell.
  • Muzzle device 5/8x24 thread instead of 1/2x28.
  • Gas port Sized for the lower-pressure 7.62x39 cartridge.
Keep

Shared With 5.56

  • Lower receiver Any mil-spec AR-15 lower.
  • Trigger group Standard triggers, the Super Safety and forced reset triggers.
  • Buffer system Carbine buffer, spring and tube; a heavier buffer helps with hot ammo.
  • Charging handle Standard AR-15 charging handle on non-side-charging uppers.
  • Handguard & furniture Any AR-15 handguard, stock and grip.
Before You Order

Choosing 7.62x39 AR Parts

A few decisions make the difference between a 7.62x39 AR that runs and one that fights you.

Barrel Length & Gas

The 10.5" carbine-gas barrel suits a pistol or SBR and pairs well with a suppressor. The 18" mid-length barrel cycles softer and pushes the round to its full velocity. Match your buffer weight to the gas length.

Steel-Cased Ammo

Most 7.62x39 on the shelf is steel-cased. Our MPI-tested bolt and 4150 CMV barrels are built for it. Expect a bit more carbon and clean the chamber and bolt face regularly.

Side Charging vs. Standard

Side-charging uppers and BCGs let you cycle the action without reaching over an optic and are popular on 7.62x39 builds. They require the matching side-charging upper; a standard BCG will not convert one.

Magazines

Standard 5.56 magazines will not feed the tapered 7.62x39 case reliably. Use magazines built for the cartridge with the correct follower and curve.

Trigger Choice

Because the lower is unchanged, a Super Safety or forced reset trigger drops in. Pair it with a heavy buffer; 7.62x39 carriers arrive with more energy than 5.56.

Frequently Asked Questions

  • Can I convert my AR-15 to 7.62x39?

    Yes. Swap the upper receiver, or the barrel and bolt carrier group, and use 7.62x39 magazines. The lower receiver, trigger, stock and buffer stay the same. Our complete 7.62x39 uppers pin to any mil-spec AR-15 lower.

  • Do I need a special bolt for 7.62x39?

    Yes. The 7.62x39 case head is larger than 5.56, so a 5.56 bolt will not extract or eject it correctly. Our 7.62x39 side-charging BCG and MPI-tested 7.62x39 BCG have the correct bolt face and extractor.

  • What muzzle thread do 7.62x39 AR barrels use?

    5/8x24, the same as .308. Our 5/8x24 stainless breacher compensator and the devices in our 5/8x24 muzzle category all fit.

  • What twist rate do your 7.62x39 barrels have?

    1:10, which stabilizes the standard 123 grain bullet as well as heavier loads. Both the 10.5" and 18" barrels are parkerized 4150 chrome moly vanadium.

  • Will a forced reset trigger work in a 7.62x39 AR?

    Yes. The lower is a standard AR-15 lower, so the Super Safety and drop-in forced reset triggers install directly. Use a heavy buffer such as the H3 or the Odin Works HFRT kit, because 7.62x39 pushes the carrier harder than 5.56.

  • Do I need an FFL to buy 7.62x39 uppers and barrels?

    Uppers and barrels ship directly to most addresses. Shipments to CA, WA, CT, NJ, New York City or Chicago require an FFL address. See our shipping restrictions before ordering.

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