5.5mm AK Stock | AK-47/AK-74 Stock Upgrade
The 5.5mm AK folding stock is one of the most sought-after upgrades for shooters who want modern performance without compromising reliability. Designed for AK-47 and AK-74 platforms, this stock combines rugged durability with tactical versatility — giving your rifle the perfect balance between function, form, and control.
🔩 Why Choose a 5.5mm AK Stock from Mounts Plus?
If you’re running an AK-pattern rifle, you already know the value of precision parts. This 5.5mm AK stock is engineered to fit rifles that use a 5.5mm rear trunnion, offering a tight lockup, smooth folding action, and rock-solid stability when extended.
Here’s why it’s trusted by builders, collectors, and shooters alike:
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Fits Most AK Platforms: Perfect for AK-47, AK-74, and other models with 5.5mm folding trunnions.
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Durable Construction: Made from high-strength materials for long-lasting performance in harsh environments.
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Folding Functionality: Quickly folds to the side for compact storage and transport.
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Easy Installation: Mounts directly to your existing trunnion with minimal fitting required.
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Customizable Feel: Compatible with many aftermarket buttstocks and adapters for a personalized setup.
Whether you’re upgrading a classic AK or building a modern tactical rifle, this folding stock delivers smooth operation, rock-solid alignment, and a professional-grade finish.
⚙️ Technical Specifications
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Type: 5.5mm AK Folding Stock
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Compatibility: AK-47, AK-74, and rifles with 5.5mm rear trunnions
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Mount Type: Folding hinge with secure lockup
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Material: High-strength steel and polymer components (varies by model)
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Finish: Corrosion-resistant coating
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Installation: No gunsmithing required for compatible receivers
Note: This stock is compatible with most Russian-pattern rifles and AK variants that use the 5.5mm hinge system. Always verify trunnion specs before installation.
🔧 Performance Meets Purpose
AK owners demand reliability, and this 5.5mm folding stock doesn’t disappoint. Its locking mechanism holds firm under recoil, the hinge pivots smoothly, and its ergonomic design ensures a consistent cheek weld and stable shooting stance.
When folded, the stock tucks neatly along the rifle’s side — ideal for transport or confined shooting spaces. When deployed, it locks back into position for uncompromising control.
This isn’t just an upgrade — it’s the foundation of a modern, battle-ready AK setup.
🔗 Compatible Rifles
This 5.5mm folding stock is compatible with most AK rifles built on a 5.5mm rear trunnion, including:
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Russian-pattern AK-74 rifles
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Bulgarian and Saiga rifles with 5.5mm folding systems
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Converted AKM or stamped-receiver rifles with 5.5mm trunnions
For rifles using a 4.5mm or fixed trunnion, you’ll need a stock adapter (available at Mounts Plus).
🧰 Installation Tips
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Verify your AK uses a 5.5mm rear trunnion.
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Remove your existing fixed or folding stock.
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Align the hinge pin with the trunnion mount.
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Secure with included hardware or factory pins.
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Test folding and locking functionality before use.
If your rifle is a custom build, we recommend consulting your gunsmith to ensure a precise fit.
🇺🇸 Why Buy from Mounts Plus
Mounts Plus is trusted by builders, hobbyists, and professionals who demand quality and service that stand behind every product. We stock only genuine, high-performance AK parts that pass our quality control inspections.
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Fast U.S. shipping
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Responsive customer service
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Expert support from real shooters
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100% satisfaction guarantee
🛒 Order Your 5.5mm AK Folding Stock Today
Upgrade your AK with confidence and precision. The 5.5mm AK stock is the perfect fusion of strength, performance, and heritage — designed to keep your rifle battle-ready for years to come.
Add to cart now and take your AK to the next level.
❓ Frequently Asked Questions
Q: Will this fit my AK-47 or AK-74 rifle?
A: Yes, as long as your rifle uses a 5.5mm rear trunnion. If your trunnion is 4.5mm or fixed, you’ll need an adapter.
Q: Can this stock be folded to either side?
A: Most 5.5mm folding stocks fold to the left side of the rifle to clear optics and charging handles.
Q: Does it require permanent modification?
A: No — this stock installs directly into compatible rear trunnions without cutting or welding.
Q: What’s the difference between 4.5mm and 5.5mm AK stocks?
A: The number refers to the hinge pin diameter. 5.5mm stocks use a slightly larger hinge and are common on later-generation AK-74s and Saigas.
Q: Do you sell the stock adapter for non-folding receivers?
A: Yes, Mounts Plus carries adapters for both 4.5mm and 5.5mm trunnion conversions. Check our AK accessories section for details.