UTG PRO® AR-15 6-Position Mil-Spec Receiver Extension Tube – CNC-Machined 6061-T6 Aluminum – Precision Rolled Threads – Matte Black Type III Hard Coat Anodized – Proudly Made in the USA – TLU001
Product Description
The UTG PRO® AR-15 6-Position Mil-Spec Receiver Extension Tube (TLU001) represents a premier mechanical benchmark in structural rifle optimization and lower receiver ergonomics, masterfully engineered and proudly manufactured in Livonia, Michigan, to supply an unwavering, high-concentricity foundation for collapsible carbine buttstocks. Purpose-built to function in perfect structural harmony with any standard Mil-Spec AR-15, M4, or large-frame AR-10/LR-308 lower receiver block, this 6-position buffer tube completely eliminates internal friction drag and loose stock tolerances. While cheap generic alternative imported buffer tubes frequently suffer from out-of-spec outer diameters, uneven anodizing, or rough cut threads that cross-thread easily and shear under heavy administrative castle nut torque—inducing critical stock wobbles and premature spring wear—this genuine UTG PRO original equipment component completely overrides those vulnerabilities. This duty-vetted hardware asset (4712274526839) provides an indispensable primary foundation for tactical carbine builds, long-range precision platforms, and high-volume range training strings.
The core structural foundation of this high-efficiency extension engine is precision CNC-machined from a solid block of premium, aerospace-grade 6061-T6 structural aluminum alloy. Celebrated throughout professional firearms manufacturing for its excellent strength-to-weight ratio and ability to resist physical denting, this robust metal core handles continuous drop stress and high-impulse buffer slap without experiencing side-wall warping or expansion. The entire interior wall is held to micro-inch surface tolerances that lower mechanical tracking resistance for your carbine buffer and spring, ensuring smooth, silent, and exceptionally reliable cycling loops. The external tube body is treated with a premium, low-reflective matte black Type III Class II hard coat anodized finish, building a resilient defensive shield against abrasive carbon caking, sweat, moisture, and harsh cleaning solvent breakdown on the workbench.
The true operational triumph of this American-built masterpiece lies in its precision rolled threads and strict tolerance control matrix. Shifting far away from standard lathed threads that naturally leave sharp micro-burrs and structural stress lines, the TLU001 layout implements high-strength precision rolled threads. This optimization ensures a buttery smooth, deep thread engagement with your lower receiver's buffer retainer channel, effectively neutralizing thread stripping during high-torque castle nut installation strings. Outfitted with six distinct positioning tracks, it allows operators to instantly customize their length-of-pull (LOP) increments to accommodate heavy body armor or changing tactical clothing profiles. Weighing a mere 0.25 pounds as a bare tube, this lightweight powerhouse provides an unyielding, zero-gap fit with premium collapsible stocks, granting you absolute structural authority downrange.
Includes: (1) Authentic UTG PRO 6-Position Mil-Spec AR-15 Receiver Extension Tube (Premium 6061-T6 Aluminum Core, Matte Black Type III Hard Coat Anodization, Precision Rolled Mounting Threads), packed in Factory Original Sealed Protective Retail Staging Packaging.
*Safety/Installation & Stock Fitment Guidance: The UTG PRO TLU001 receiver extension is machined strictly to standard Mil-Spec outer diameter specifications (~1.148 inches); it will NOT physically accept, clear, or slide inside oversized Commercial-Spec collapsible buttstocks (~1.17 inches). Always ensure your receiver extension is aligned completely dead-center with the lower receiver block before applying manual torque to your castle nut to prevent crushing the internal buffer retainer pin channel. Prior to executing administrative teardowns or stock replacements on the workshop bench, always verify that your host firearm is completely unloaded, physically cleared, and verified safe.
Key Features
- Proudly Designed and Made in the USA: Manufactured under strict domestic quality control oversight to guarantee exact mechanical spec limits and structural alignment.
- 6061-T6 Aircraft Grade Aluminum: Precision CNC-machined from high-yield structural alloy to resist wall expansion under intense spring compression loads.
- High-Strength Rolled Threads: Implements precision rolled threading to ensure ultra-deep, strip-resistant lower receiver engagement and high-torque reliability.
- Type III Class II Hard Coat Anodized: Premium matte black surface coating provides an exceptionally smooth internal track while shielding the exterior from harsh environmental corrosion.
- Tight Tolerance Zero-Gap Fit: Meticulously calibrated outer diameter minimizes stock rattle and wobble, promoting a stable, silent manual purchase during tactical maneuvers.
- 6-Position Adjustment Array: Features six cleanly machined indexing tracks to accommodate fine-tuned length-of-pull settings across any operational armor kit.
Product Specifications
- Brand: UTG PRO® / Leapers, Inc. (Livonia, Michigan, USA)
- Product Line: American-Made Firearm Performance Upgrade & Lower Receiver Matrix
- Model Series Designation: UTG PRO AR-15 6-Position Mil-Spec Buffer Tube - Black
- SKU / MPN: TLU001 (Alternative Industry References: UTG-TLU001 / LEA-TLU001)
- Firearm Receiver Footprint: Fits All Standard Mil-Spec AR-15, M4, M16 Lower Receivers
- Large Frame Versatility: Cross-Compatible with AR-10, LR-308, and SR-25 DPMS-Pattern Lower Receivers (Using Proper Carbine Internal Components)
- Stock Interface Specification: Mil-Spec Diameter Only (~1.148" / 29.16mm Outer Profile)
- Buttstock Exclusions: Incompatible with Commercial-Spec Buttstocks (~1.17" Diameter)
- Number of Position Tracks: 6-Position Longitudinal Length-of-Pull Array
- Material Composition Core: CNC-Machined 6061-T6 Aircraft-Grade Extruded Structural Aluminum
- Surface Coating Treatment: Protective Matte Black Type III Class II Hard Coat Anodizing
- Thread Architecture Profile: High-Strength Precision Rolled Structural Engagement Threads
- Mechanical Integration: Accepts Standard Carbine Buffers & Springs (Not Included)
- Product Net Component Weight: ~4.00 oz (~0.250 lbs) - Featherweight Core Receiver Extension
- Total Packaging Shipping Mass: ~0.35 lbs (Enclosed Inside Protective Padded Shipping Materials)
- UPC Barcode: 4712274526839
