NBS Mil-Spec 6 Position Receiver Extension / Buffer Tube

Name: NBS Mil-Spec 6 Position Receiver Extension / Buffer Tube
Brand: NBS

NBS · Buffer Tubes & Springs

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Best price

$14.95at Dirty Bird

Sale checked Oct 31, 2026

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Where to buy

Store	Price	Availability	Buy	Add to build
Dirty Bird Best price	$14.95Salechecked Oct 31, 2026	Check store	Buy at Dirty Bird
AR15Discounts	$21.95checked Oct 31, 2026	Check store	Buy at AR15Discounts

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

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Dashed line = out of stock. Tracking since Oct 28, 2026.

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Store	Latest	Lowest	Highest
AR15Discounts	$21.95	$12.95	$21.95
Dirty Bird	$14.95	$14.95	$14.95

Since Oct 28, 2026.

About this part

The NBS Mil-Spec 6 Position Receiver Extension / Buffer Tube is an AR-15 buffer part from NBS. It's sold by 2 stores, from $14.95 to $21.95.

Fits and works with

Buffer system: Carbine · Buffers and springs

Specifications

Manufacturer: NBS
Type: Buffer Tube
Platform: AR-15
Material: Aluminum

From the manufacturer

The NBS Mil-Spec Buffer Tube is a quality Receiver Extension (AKA Buffer Tube) machined from high strength American 7075-T6 Aluminum. This is a 6 position design and is a finished with Type 3 class 2 Hard Anodizing. *These are sourced from various manufacturers, and tubes received might vary slightly from batch to batch in regards to finish and design. However, buy with confidence as these are backed by our NBS satisfaction guarantee. American Made 7075-T6 Aluminum Platform: AR-15 Positions: 6 Weight: 3.872 Oz