TacFire Short Buffer Tube System — Black Anodized Aluminum with QD End Plate for AR Pistol Platform (MAR139C | UPC 686294505331)

Shrink your build without sacrificing strength. The TacFire Short Buffer Tube System pairs a black anodized aluminum tube with a QD sling end plate, giving AR-pistol projects a compact, rugged receiver extension that plays nicely with modern slings and minimalist setups. Built for durability and clean ergonomics, model MAR139C helps you streamline overall length, improve sling management, and keep your rear end hardware tight and tidy.

Why Choose the TacFire Short Buffer Tube System?

• Compact Receiver Extension: Short tube geometry supports space-saving AR pistol configurations while maintaining robust alignment and thread engagement.

• Durable Aluminum Construction: Precision-machined, black anodized aluminum resists dings, wear, and corrosion through hard range days and rough transport.

• Integrated QD End Plate: Sling up fast—anti-rotation QD socket (end plate) puts your two-point sling exactly where it should be for clean, snag-free transitions.

• Clean, Low-Profile Aesthetic: Minimal bulk at the rear of the receiver enhances shouldering and storage in bags, cases, and vehicles.

• AR-Platform Compatibility: Designed around mil-spec AR pistol builds for straightforward installation with standard tools.

Key Features & Specs

• Model / Part: MAR139C

• UPC: 686294505331

• Platform: AR pistol (AR-15 pattern)

• Material: Aluminum receiver extension & QD end plate

• Finish: Black anodized

• Sling Interface: QD socket on the end plate for push-button swivel (swivel not included)

• Threading: Standard AR lower receiver extension threads (1-3/16"-16 UNEF; verify spec with your lower)

• Use Case: Compact pistol builds, truck/ranch rifles, training setups, and minimalist defensive carbines

Note: Buffer, buffer spring, recoil system internals, castle nut, and sling swivel are typically not included unless specified by your retailer’s bill of materials.

Performance Benefits You’ll Notice

• Better Sling Control: The QD end plate keeps your rear sling point close to centerline, reducing roll and improving rifle retention when moving or working around cover.

• Reduced Overall Length: A short tube helps with storage and maneuverability while maintaining a solid mounting surface.

• Consistency & Strength: Quality threads and anodized surfaces support repeatable torque and long service life.

Ideal Use Cases

• Concealable & Compact Builds: Short receiver extension is perfect for bag-carry and vehicle storage (follow all local laws).

• Training & Classes: Quick QD attachment speeds gear changes between drills.

• Home & Property: Streamlined footprint and reliable sling interface for practical handling indoors and around equipment.

Compatibility & Fit Notes

• Receivers: Mil-spec AR-15 lowers using standard receiver extension threads.

• Sling Swivels: Works with most push-button QD swivels (not included).

• Recoil System: Use a pistol-appropriate buffer and spring matched to your gas system and barrel length.

• Stocks/Braces: Follow current regulations for braces/stocks and overall configuration in your jurisdiction.

Installation Tips (Non-Instructional)

1. Unload & Clear: Verify your firearm is safe before work.

2. Prep Threads: Degrease receiver and tube threads; lightly oil for smooth engagement.

3. Align & Torque: Install the QD end plate in the correct orientation; torque the castle nut to spec and stake if your setup calls for it.

4. Function Check: Ensure the buffer retainer is captured, safety selector operates correctly, and the QD socket locks the swivel securely.

5. Sling Setup: Adjust two-point sling length to clear your light/handstop while maintaining a comfortable presentation.

Care & Maintenance

• Wipe Down anodized surfaces after rain or dust; apply a thin protectant film.

• Inspect Hardware after the first range session for proper torque and staking.

• Check QD Socket for debris; confirm positive latch of the QD swivel before use.

What’s in the Box*

• TacFire Short Buffer Tube System — Black Anodized

• QD End Plate (integrated or included per package)
  *Exact contents may vary by lot—always verify your retailer’s bill of materials.

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TacFire Short Buffer Tube System — Black Anodized Aluminum with QD End Plate (MAR139C | 686294505331): a tough, compact receiver extension that simplifies sling management and tightens up your AR pistol build—durable, low-profile, and purpose-built for modern configurations.

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