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Vltor A5 Buffer System – Complete Kits & Parts | MSP
Vltor A5 Buffer System – Upgrade Your AR for Smoother Cycling & Control
The Original A5 Buffer System by Vltor Weapon Systems
The Vltor A5 system is widely regarded as one of the best recoil and reliability upgrades for AR-15 and AR-10 rifles. Developed by Vltor Weapon Systems, the A5 system combines the length and spring tension of a rifle buffer system with the compact form factor of a carbine stock setup—delivering unmatched cycling smoothness, recoil mitigation, and component durability.
Whether you're building a duty rifle, competition gun, or defensive carbine, the Vltor A5 provides a noticeable improvement in performance over standard carbine buffers. It's trusted by the military, law enforcement, and professional shooters across the country.
Why Choose the Vltor A5 System?
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Rifle-like recoil performance with carbine stock compatibility
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Longer receiver extension = smoother bolt travel and less wear
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Works with standard mil-spec lower receivers
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Reduces bolt bounce and enhances reliability
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Improves spring longevity and buffer weight tuning
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Designed, manufactured, and tested in the USA
Shop Vltor A5 Kits & Components
Complete A5 Buffer System Kits
Includes:
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Vltor A5 receiver extension (7-position)
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A5 rifle-length action spring
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A5 buffer (H0–H3 weights available)
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Castle nut & endplate (optional)
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Compatible with most mil-spec carbine stocks
Individual Components
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Vltor A5 H2 & H3 Buffers
Precision-machined stainless steel bodies for controlled recoil. -
Vltor A5 Receiver Extension (Buffer Tube)
7-position mil-spec tube built for A5 spring/buffer length. -
Vltor A5 Rifle-Length Spring
Optimized tension for enhanced cycling consistency. -
Combo Kits & Tuning Kits
Choose from standard or heavy buffer configurations.
Compatibility & Fitment
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Fits AR-15 lower receivers
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Works with most mil-spec carbine stocks
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Compatible with AR-10 / .308 platforms (some tuning may be required)
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Works with standard BCGs and buffer retainer pins
Note: A5 buffer tubes are longer than carbine extensions. Do not use carbine buffers or springs with A5 tubes.
What Makes the A5 System Different?
| Feature | A5 System | Standard Carbine System |
|---|---|---|
| Buffer Length | Longer (A5 specific) | Shorter (carbine specific) |
| Spring | Rifle-length spring | Carbine spring |
| Tube Length | Extended (7-position A5) | Standard 6-position |
| Felt Recoil | Softer, more controlled | Sharper impulse |
| Wear & Tear | Reduced component stress | Higher wear rates |
Frequently Asked Questions
What is the Vltor A5 system?
It’s a hybrid buffer system designed by Vltor to improve the function of AR-15s by combining a longer buffer tube and rifle-length spring with a collapsible stock configuration.
Can I use my current AR-15 lower with the A5 system?
Yes. The A5 system fits standard mil-spec AR-15 lowers. You’ll need the dedicated A5 buffer, tube, and spring.
Is it compatible with my current stock?
Most mil-spec diameter carbine stocks (e.g. Magpul CTR, B5 SOPMOD) will fit the A5 buffer tube.
Is the A5 good for suppressed rifles?
Yes. The longer spring and buffer weights can help slow down over-gassed suppressed setups for more reliable function.
Can I use an A5 buffer in a carbine tube?
No. A5 buffers are longer and must be used with the correct A5 receiver extension and spring.
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Elevate Your AR's Reliability with Vltor A5
Whether you're upgrading an existing rifle or building from the ground up, the Vltor A5 buffer system offers a proven, high-performance alternative to traditional carbine buffer setups. Improved function. Smoother recoil. Real-world reliability.
Order your A5 system from Mounts Plus today — fast shipping and expert service included.