Guntec USA AR-15 Heavy Duty Wide Castle Nut For Car/M4 Buffer Tube Black

Name: Guntec USA AR-15 Heavy Duty Wide Castle Nut For Car/M4 Buffer Tube Black
Brand: Guntec Usa
Availability: InStock

Guntec Usa · Buffer Tubes & Springs

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Best price

$8.99at OpticsPlanet

In stock Sale checked Oct 31, 2026

Buy at OpticsPlanet

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Where to buy

Store	Price	Availability	Buy	Add to build
OpticsPlanet Best price	$8.99Salechecked Oct 31, 2026	In stock	Buy at OpticsPlanet
Battlehawk Armory	$5.89Salechecked Oct 31, 2026	Check store	Buy at Battlehawk Armory

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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Lowest in-stock price in the last 30 days: $8.99 at OpticsPlanet. Dashed line = out of stock. Tracking since Oct 27, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Battlehawk Armory	$5.89	$5.89	$6.04
OpticsPlanet	$8.99	$8.99	$8.99

Since Oct 27, 2026.

About this part

The Guntec USA AR-15 Heavy Duty Wide Castle Nut For Car/M4 Buffer Tube Black is an AR-15 buffer part from Guntec Usa. It's sold by 2 stores (1 in stock), from $5.89 to $8.99. The lowest in-stock price in the last 30 days was $8.99 at OpticsPlanet.

Specifications

Manufacturer: Guntec Usa
Type: Buffer Tube
Platform: AR-15

From the manufacturer

Guntec USA AR-15 Heavy Duty Wide Castle Nut For Car/M4 Buffer Tube Black. The manufacturer says that Guntec USA AR-15 Heavy Duty Wide Castle Nut For Car/M4 Buffer Tube is compatible with AR-15GUNTEC USA CASTLE-HD: AR15 Heavy Duty Wide Castle Nut For Car/M4 Buffer Tube Black