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AR Pistol Buffer Tube | Mil-Spec AR-15 Pistol Tubes – Mounts Plus
AR Pistol Buffer Tube – Mil-Spec Extensions for AR-15 Pistols
Upgrade your AR-15 pistol with a reliable, brace-compatible AR Pistol Buffer Tube. Whether you're building a new pistol or replacing a factory part, the right buffer tube ensures proper recoil management, brace fitment, and consistent performance.
At Mounts Plus, we stock mil-spec AR pistol buffer tubes from trusted brands like ATI, UTG PRO, Phase 5, and more. All tubes are built for tight fit, lightweight strength, and compatibility with stabilizing braces or foam sleeves.
✅ Why Choose Our AR Pistol Buffer Tubes?
When building an AR pistol, not just any buffer tube will do. Our carefully selected AR pistol buffer tubes provide:
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🔩 Mil-Spec Diameter (1.14") – Guaranteed brace fit and compatibility
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🧱 Durable Construction – Machined aluminum for strength and longevity
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🔧 Easy Installation – Standard threading fits most AR-15 lowers
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🧊 Foam-Covered & Slick Options – For brace or minimalist configurations
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🔫 Pistol-Only Length – Compact design for legal AR pistol builds
📊 Compare Our Top AR Pistol Buffer Tubes
| Product Name | Tube Spec | Type | Includes Spring & Buffer | Price |
|---|---|---|---|---|
| ATI Mil-Spec AR-15 Buffer Tube Kit | Mil-Spec | Carbine | ✅ Yes | $63.12 |
| Aero Precision Enhanced Buffer Kit | Mil-Spec | Carbine | ✅ Yes | $80.28 |
| Timber Creek Carbon Fiber Buffer Kit | Mil-Spec | Carbine | ✅ Yes | $71.99 |
| Luth-AR Rifle-Length Buffer Kit | Rifle | Fixed Stock | ✅ Yes | $65.00 |
| Deltac Pistol Buffer Tube Assembly | Pistol | Pistol Build | ✅ Yes | $63.12 |
All models ship fast from our U.S. warehouse and include mounting hardware.
Compatibility & Use Cases
Our AR pistol buffer tubes are designed for:
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🔘 AR-15 pistol builds (5.56/.223, .300BLK, 9mm, etc.)
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🔘 Use with stabilizing braces (SBA3, SBPDW, etc.)
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🔘 Custom builds requiring minimalist setups
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🔘 Builders who want lightweight, compact recoil systems
Each tube is tested to work with mil-spec carbine buffer springs and standard AR pistol bolt carrier groups.
🛠️ Installation Tips
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✅ Thread buffer tube into AR pistol lower receiver
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✅ Use a buffer tube wrench to tighten the castle nut
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✅ Insert recoil spring and buffer
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✅ Attach brace or foam pad (optional)
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🔐 Stake the castle nut if required
Ensure you're using a mil-spec pistol lower for legal compliance and brace fit.
❓ Frequently Asked Questions (FAQs)
What is an AR pistol buffer tube used for?
It holds the buffer spring and buffer, enables bolt cycling, and provides a mounting point for a stabilizing brace on AR pistols.
Will these buffer tubes work with all braces?
Yes, as long as the brace is made for mil-spec buffer tubes, it will fit any product listed here.
Can I use a regular AR-15 rifle buffer tube on a pistol?
No. Rifle buffer tubes are too long and may not comply with legal pistol regulations. Always use a dedicated AR pistol buffer tube.
What’s the difference between foam and slick tubes?
Foam tubes improve comfort and provide a grip surface. Slick tubes are ideal for ultralight or minimalist setups.
🛒 Shop AR Pistol Buffer Tubes at Mounts Plus
Mounts Plus is your trusted source for high-quality AR pistol parts and accessories, with U.S. inventory, fast shipping, and expert support.
✅ Mil-Spec AR Pistol Tubes from ATI, Phase 5, UTG PRO
✅ Brace-compatible with SBA3, SBPDW, and others
✅ Foam-covered & slick body options
✅ Durable, reliable, and ready to install
✅ Competitive pricing + fast delivery