LBE Unlimited AR15 Mil-Spec 6-Position Buffer Tube Colt Gray - MBUF002-CG

LBE Unlimited AR15 Milspec Recoil Buffer Tube Colt Gray MBUF002 CG UPC 706612407694

Product Description

The LBE Unlimited® AR-15 Mil-Spec Recoil Buffer Tube in Colt Gray (SKU: MBUF002-CG / UPC: 706612407694) is a premium carbine receiver extension purpose-built for retro clones, duty rifles, and custom AR builds. Providing a definitive Mil-Spec 1.148-inch outer tube diameter, this 6-position extension ensures rock-solid, wobble-free lockup with all standard military-specification collapsible buttstocks, giving shooters consistent cheek weld and reliable shoulder indexing under harsh operating conditions.

Precision-manufactured in the USA from durable 6061-T6 aluminum, the tube is impact-extruded and CNC-machined to hold strict concentricity across the entire internal bore. The exterior and interior surfaces are treated with a heavy-duty MIL-A-8625 Type III Class 2 hardcoat anodize in classic Colt Gray, delivering a durable, dry-lubricious finish that reduces carrier cycle friction, prevents surface galling from steel buffer weights, and resists corrosion from sweat, bore cleaners, and extreme weather.

Engineered with 6 precision-milled indexing detent holes along the lower track, this receiver extension allows instant length-of-pull adjustment to accommodate body armor, heavy cold-weather outerwear, or compact vehicle operations. The standard 1-3/16"-16 UN rolled threads ensure clean, damage-free engagement with your lower receiver's buffer ring, while the front indexing lip properly retains the buffer retainer detent and spring during long-term field use.

*Armorer Bench Notes & Real-World Staging Guidance:*

Fitment Matrix: Compatible with all standard Mil-Spec AR-15 lower receivers and Mil-Spec diameter collapsible buttstocks. [CRITICAL: Will NOT accept Commercial-Spec buttstocks (1.168" ID) without severe stock wobble, nor will it accept rifle-length A1/A2 buffers or intermediate VLTOR A5 buffers. Requires a standard AR-15 carbine buffer (3.0 oz carbine, H1, H2, or H3) and a standard carbine recoil spring. Always apply anti-seize or aerosol grease to receiver threads before installation. Castle nut torque specification is 38-42 ft-lbs; dual-stake end plate into castle nut notches upon completion.]

1. Ensure host firearm is completely clear, magazine removed, and chamber visually and physically verified empty.
2. Thread the castle nut (flange facing forward) and receiver end plate onto the buffer tube threads all the way to the rear stop.
3. Thread the buffer tube into the stripped receiver ring until the front lip touches the buffer retainer detent hole, then insert the buffer retainer and spring.
4. Turn the tube one additional rotation until the lower lip captures the buffer detent shoulder while maintaining vertical alignment of the lower stock index rail.
5. Slide the end plate flush into the receiver alignment recess, hand-tighten the castle nut forward, torque with an armorer's castle nut wrench to 38–42 ft-lbs, and stake the end plate into the castle nut staking notches using an automatic center punch.

Key Features

• Mil-Spec 1.148-Inch Outer Diameter: Guarantees precise mechanical lockup and zero dimensional play with all Mil-Spec collapsible buttstocks.
• 6-Position Adjustment Track: Provides granular length-of-pull settings to rapidly configure the carbine for varying armor loadouts and shooting positions.
• 6061-T6 Aluminum Construction: Offers maximum structural integrity against dynamic cycling recoil and heavy shoulder impacts.
• Type III Hardcoat Anodized Colt Gray Finish: Authentic retro-accurate aesthetic that provides superior surface hardness, scratch resistance, and chemical defense.
• Precision Rolled 1-3/16"-16 UN Threads: Ensures smooth engagement into lower receivers and prevents thread stripping under heavy cycling loads.
• Machined Buffer Lip & Vent: Properly secures the buffer retainer pin and provides drainage relief for waterborne deployment.

Product Specifications

• Brand: LBE Unlimited®
• Model/Series: AR-15 Mil-Spec Recoil Buffer Tube
• MPN / SKU: MBUF002-CG / LBMBUF002-CG
• UPC: 706612407694
• Material: 6061-T6 Aluminum
• Finish: MIL-A-8625 Type III Hardcoat Anodize (Colt Gray)
• Tube Diameter: Mil-Spec (1.148 inches)
• Adjustment Positions: 6 Position
• Thread Pitch: 1-3/16"-16 UN
• Platform Compatibility: AR-15 / M4 / M16 Receivers (Carbine System)
• Country of Origin: USA