Phase 5 PBT-Ca Pistol Buffer Tube Assembly
Phase 5 PBT-Ca Pistol Buffer Tube Assembly is a rugged, minimalist upgrade for AR-15 pistol builds, offering excellent strength, compatibility, and comfort in a compact form factor. Built from 7075-T7 aluminum, this fixed-length tube is designed for stability and reliability, even in the most demanding tactical environments.
Whether you’re building an AR pistol for personal defense, tactical operations, or range use, the Phase 5 PBT-Ca buffer tube kit provides the durability and performance needed to support your setup. It features a 7075 aluminum buffer tube, end plate, castle nut, buffer, and spring — everything you need for a complete and high-quality pistol buffer assembly.
With a sleek, hard-anodized finish and snug fitment, this system reduces rattle while delivering enhanced strength-to-weight performance and compatibility with most AR-15 lower receivers.
Key Features of Phase 5 PBT-Ca Pistol Buffer Tube Assembly
✅ Complete Buffer Tube Kit for AR Pistols
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Includes buffer tube, buffer, spring, castle nut, and end plate
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All-in-one solution for AR-15 pistol builds
✅ High-Grade Aluminum Construction
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Machined from 7075-T7 aluminum for superior durability
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Hardcoat anodized for corrosion resistance and a professional finish
✅ Fixed-Length, Slim Profile
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Compact, non-adjustable design for minimalist builds
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Offers improved weapon control and reduced weight
✅ Snug Fit and Solid Lockup
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Eliminates excess movement and rattle found in some mil-spec tubes
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Tight interface with lower receiver for better performance
✅ Phase 5 Tactical Engineering
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Known for premium-grade mission-ready parts
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Designed, manufactured, and tested in the USA
Technical Specifications of Phase 5 PBT-Ca Pistol Buffer Tube Assembly
| Feature | Details |
|---|---|
| Brand | Phase 5 Tactical |
| Model | PBT-Ca Pistol Buffer Tube Assembly |
| Material | 7075-T7 Aluminum |
| Finish | Hardcoat Anodized |
| Fitment | AR-15 Pistol Lowers |
| Included Components | Buffer tube, spring, buffer, end plate, castle nut |
| Weight | Approx. 5.5–6.2 oz (varies slightly) |
| Mount Type | Fixed-length, non-adjustable |
| Made in USA | ✅ Yes |
Why Choose the Phase 5 PBT-Ca Pistol Buffer Tube Assembly?
This is more than just a buffer tube — it’s a precision-engineered, performance-ready upgrade that serious AR pistol builders trust.
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️ Built for AR pistol use with tactical-grade stability
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Enhanced material strength for durability under recoil
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All-in-one install kit—no guesswork, no missing parts
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Made in the USA, backed by Phase 5’s reputation for elite firearm components
Whether you’re outfitting a compact CQB rig, a truck gun, or a range-focused build, this assembly offers everything you need in one complete, rock-solid package.
Frequently Asked Questions
Q: Is this buffer tube adjustable?
A: No, this is a fixed-length tube designed specifically for AR pistol applications, where compactness and rigidity are key.
Q: What AR platforms does this work with?
A: The PBT-Ca is compatible with standard AR-15 lower receivers intended for pistol configurations.
Q: Does it come with the buffer and spring?
A: Yes. This is a complete buffer tube assembly, including the buffer, spring, castle nut, and end plate.
Q: Is this legal for pistol builds?
A: Yes, the fixed buffer tube design is compliant with AR-15 pistol configurations, but always verify compliance with local and federal laws.
Looking for a no-nonsense, durable, and lightweight buffer tube assembly for your AR pistol? The Phase 5 PBT-Ca Pistol Buffer Tube Assembly offers unbeatable build quality, American-made precision, and complete installation ease.
Trusted by professionals, designed for hard use.
Upgrade your pistol build now with Phase 5’s elite buffer tube solution!
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