AK Compatibility Guide

What Fits, What Doesn’t, and What Needs Verified

AKM. AK-74. Yugo. Milled. RPK. VEPR. PSL. Folding stocks. Side rails. Different calibers. Different muzzle threads. Same general family, absolutely not one universal parts bin.

Receiver Pattern   |   Furniture   |   Magazines   |   Optics   |   Muzzle Devices

One of the fastest ways to waste money on an AK is to search for “AK parts.”

That search makes the platform sound far more standardized than it really is.

Yes, the Kalashnikov family shares a common mechanical lineage. Yes, a lot of parts overlap. And yes, the standard stamped AKM pattern became a huge aftermarket baseline.

But furniture pattern, receiver construction, rear trunnion, caliber, magazine geometry, side-rail pattern, front sight block, muzzle thread, barrel dimensions, folding-stock system, and individual manufacturing tolerances can all change the answer.

“Fits AK” is not a compatibility specification.

Stocks and handguards make the compatibility differences painfully obvious because the parts physically meet the receiver, trunnion, barrel and retaining hardware.

Magpul's MOE AKM handguard is designed around standard stamped AK-47 / AKM / AK-74-style handguards but specifically excludes Yugo-pattern rifles, RPK-style receivers and milled receivers.

Its standard MOE AK stock likewise excludes Yugo-pattern rifles, traditional milled receivers and certain Chinese rifles because the rear interface differs.

That is why Magpul sells a separate Yugo Zhukov stock instead of pretending one stock fits everything.

Multiple major AK accessory manufacturers warn that minor fitting may still be required even when the part is sold for the correct pattern. AKs have been produced by different countries, factories and manufacturers across decades, and dimensions can vary enough that proper fitment still needs to be checked on the actual rifle.

If you own a Zastava ZPAPM70, NPAP, OPAP or another Serbian/Yugo M70-pattern rifle, this should be one of the first things you learn.

Standard AKM stocks and handguards are not automatically compatible.

Zastava's own furniture listings group the ZPAPM70, M90, M77, NPAP, OPAP and other Serbian/Yugo-pattern rifles together. Magpul and Midwest Industries likewise separate Yugo products from ordinary AKM products.

Translation: if the product page says AKM only, don't buy it for an M70 and hope enthusiasm changes the trunnion geometry.

A stamped AKM uses a sheet-metal receiver with separate trunnions riveted into it.

A traditional milled AK receiver is machined as a solid receiver structure. Arsenal's SAM7 family is a modern example built around a forged-and-milled receiver.

That difference changes several furniture interfaces. If an aftermarket product says “not compatible with milled receivers,” believe the product page.

Fixed-stock stamped AKM. Yugo fixed stock. Traditional milled receiver. Underfolder. Sidefolder. Modern adapters.

Those are not cosmetic descriptions. They describe different ways the rear of the rifle is built.

Before ordering a stock, identify the receiver type and rear-trunnion / folding system. Do not identify stock compatibility from a picture of the rifle's left side and vibes.

Handguard compatibility is not just stamped versus milled.

Manufacturers may also specify barrel diameter, contour, handguard-retainer position, sling-loop clearance and other dimensions.

Midwest Industries explicitly says that AK differences are broad enough that buyers may need to verify barrel dimensions before selecting certain handguards. Its Alpha handguards are listed for most stamped AKM-type rifles while specifically excluding Yugo/M70 and milled receivers.

The lesson: pattern gets you into the right neighborhood; the manufacturer's actual fitment list gets you to the house.

The obvious rule comes first: a 7.62×39 AK magazine and a 5.45×39 AK-74 magazine are different systems.

Magpul, for example, sells separate AK/AKM magazines for 7.62×39 and AK-74 magazines for 5.45×39.

The bigger headache is 5.56×45 AKs. There is no assumption worth making from caliber alone. Arsenal's SLR-106 family uses Bulgarian-pattern 5.56 magazines, while Zastava markets dedicated 5.56 magazine options for its M90 and ZPAP85 family.

The familiar left-side AK optic rail makes mounting optics look simple.

Then you look at an actual compatibility catalog.

RS Regulate maintains different lower mounts for standard AK-pattern rifles, Zastava/Yugo rifles, Romanian M10/RH10 variants, PSLs, VEPRs and other configurations.

Their system makes the compatibility logic obvious: the lower mount fits the rifle; the upper mount fits the optic. Both halves have to be right.

Classic AKM-style 7.62 rifles commonly use one muzzle interface while AK-74 / AK-100-style front-sight assemblies commonly use another.

Arsenal's stamped 7.62×39 SLR-107R, for example, is documented with 14×1 mm left-hand muzzle threads.

Arsenal separately lists AK-74 / AK-100-pattern front sight blocks with 24×1.5 mm right-hand threads.

And those are only examples. Verify the exact rifle before ordering a muzzle device, especially on short variants, imports, converted rifles and less-common national patterns.

Stocks and handguards can be annoying when they don't fit. Bolts, barrels and locking components are a different level of compatibility problem.

Do not assume a bolt or barrel is interchangeable because it came from the same caliber or looks identical. Those components affect the firearm's locking relationship and require exact model/specification verification.

1. Write down the exact manufacturer and model.
2. Identify stamped vs. milled.
3. Identify the furniture / receiver family. AKM, Yugo/M70, RPK, VEPR, etc.
4. Identify the rear-stock interface.
5. Verify caliber and magazine pattern.
6. Verify the optic-rail pattern if mounting from the side rail.
7. Verify the muzzle interface before ordering a brake, flash hider or suppressor mount.
8. Read the manufacturer's compatibility list for the exact part. Do not stop at the product title.

The AK platform is not incompatible chaos.

It just requires you to stop treating a century-spanning international rifle family like a single SKU.

Identify the rifle first. Identify the pattern second. Verify the exact part third. Do that, and AK compatibility becomes a hell of a lot less mysterious.

This guide was built from current manufacturer documentation and compatibility information rather than assuming the word “AK” means universal.

• Magpul — MOE AKM Hand Guard
  Standard stamped AK compatibility, Yugo / RPK / milled exclusions and fitting notes.
• Magpul — AK / AKM Stocks
  Separate standard AK and Yugo stock families.
• Midwest Industries — AK Compatibility Guidance
  AKM / Yugo / milled identification and handguard fitment guidance.
• Midwest Industries — AK Compatibility Chart
• Zastava Arms USA — Serbian/Yugo Handguard Compatibility
• RS Regulate — AK Optic Mount Compatibility
• RS Regulate — Rifle-Specific Lower Mounts
• Arsenal — SLR-107R Technical Specifications
  Stamped 7.62×39 example with 14×1 LH muzzle interface.
• Arsenal — AK-74 / AK-100 Front Sight Block
  24×1.5 RH muzzle-thread example.
• Arsenal — SAM7 Milled Receiver Family

IRONKELLS ARMORY | AK FORGE FILES

Know the Pattern Before You Buy the Part.

AK compatibility isn't magic. Identify the rifle, verify the interface, and stop asking one three-letter acronym to describe seventy years of different rifles.