LBE Unlimited Pistol Buffer Tube — Red, AR-Platform (Model PBTRED | UPC 706612407656)
Give your AR-platform pistol build a bold visual accent plus rock-solid function with the LBE Unlimited Pistol Buffer Tube (PBTRED). Machined to tight tolerances from aircraft-grade aluminum and finished in a durable red coating, this receiver extension is designed as a drop-in, direct-fit solution for pistol-length AR builds, PDW conversions, and SBR lower assemblies where a pistol buffer tube is specified. It combines lightweight strength, precise fitment, and a distinctive red finish for builders who demand reliability and style.
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Built for Function — Styled for Form
The PBTRED is produced from CNC-machined aluminum for consistent dimensions and durability. Its red finish is more than cosmetic — it’s a hard, corrosion-resistant coating that stands up to handling, holstering, and the elements. Whether you’re assembling a compact PDW, customizing a pistol-caliber AR, or adding a distinctive touch to a range piece, this tube gives you both dependable service and standout aesthetics.
Designed for AR-Pistol & PDW Applications
This tube is sized and spec’d for pistol-length or PDW buffer applications (verify your specific receiver/upper configuration before installation). It accepts pistol-spec stocks or brace mounting systems and provides the correct interface for pistol buffer springs and weights intended for shorter stroke systems. It is ideal for:
AR-pistol builds (9mm, .300 BLK PDW conversions)
PDW/short-stroke projects and compact carbines
Custom builds where a reduced receiver extension is required
Builders seeking a colored component to match or accent a themed build
Key Features & Benefits
Model: PBTRED — LBE Unlimited pistol buffer tube
UPC: 706612407656
Material: CNC-machined aircraft-grade aluminum — light and durable
Finish: Durable red corrosion-resistant coating (low-glare)
Fit: Direct replacement / drop-in for pistol-spec receiver extensions (verify fit with your lower)
Compatibility: Designed for pistol buffer springs, pistol buffer weights, and pistol-specific stocks/braces (confirm part compatibility)
Benefits: Lightweight, precise fitment, corrosion resistance, instant visual customization, easy installation
Installation Overview
Safety first: Ensure the firearm is unloaded and the upper is separated from the lower receiver.
Remove existing hardware: If replacing a tube, remove the castle nut and endplate and slide off the old tube per standard armorer procedure.
Install PBTRED: Slide the PBTRED over the receiver extension boss and time the endplate and castle nut as required for your sling plate or brace configuration.
Torque & Verify: Torque the castle nut to manufacturer specs and confirm smooth operation of your chosen stock/brace and buffer assembly.
Function check: Reassemble and perform a full function check and live-fire confirmation to ensure reliable cycling.
If you are unfamiliar with buffer tube installation, consult a qualified armorer or gunsmith.
Compatibility & Best Practices
The PBTRED is intended for pistol-specific receiver extension applications — do not mix with commercial-diameter stocks unless explicitly specified.
Verify that your chosen buffer, spring, and stock/brace are pistol-spec and compatible with the tube length and threading.
When installing braces, follow all current laws and manufacturer instructions regarding attachment and use.
Check torque and endplate timing after initial live-fire; hardware can settle slightly after the first range session.
Care & Maintenance
Keep the tube free of heavy carbon build-up or grit; a periodic wipe down and light lubrication of mating surfaces helps preserve fit and finish.
Inspect the red finish for chips or wear and touch up as needed with compatible coatings or by consulting LBE Unlimited for replacement options.
Verify castle nut torque and endplate alignment during routine maintenance.
Why Choose LBE Unlimited PBTRED?
The LBE Unlimited PBTRED is more than an aesthetic upgrade — it’s a precision component engineered to perform. With CNC machining tolerances, a durable red finish, and direct compatibility with pistol-spec AR components, it’s an ideal choice for builders who want reliability plus a unique look. Whether you’re creating a showpiece, building a compact PDW, or replacing a worn receiver extension, the PBTRED offers dependable fitment and a striking finish that sets your build apart.
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