Ergo .750 Low Profile Gas Block - 4821

Name: Ergo .750 Low Profile Gas Block - 4821
Availability: InStock

Gas System

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Best price

$20.49at OpticsPlanet

In stock Sale checked Oct 1, 2026

Buy at OpticsPlanet

Compare 2 stores

Where to buy

Store	Price	Availability	Buy	Add to build
OpticsPlanet Best price	$20.49Salechecked Oct 1, 2026	In stock	Buy at OpticsPlanet
Palmetto State Armory	$23.99checked Oct 1, 2026	Check store	Buy at Palmetto State 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: $20.49 at OpticsPlanet. Dashed line = out of stock. Tracking since Sep 28, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
OpticsPlanet	$20.49	$20.49	$20.49
Palmetto State Armory	$23.99	$23.99	$23.99

Since Sep 28, 2026.

About this part

The Ergo .750 Low Profile Gas Block - 4821 is a gas system part. It's sold by 2 stores (1 in stock), from $20.49 to $23.99. The lowest in-stock price in the last 30 days was $20.49 at OpticsPlanet.

Fits and works with

Gas block: 0.75" diameter · Gas blocks

From the manufacturer

The Ergo 4821 .750 Low Profile Gas Block is designed to fit under the Ergo Modular and SuperLite™ Rail System, as well as most other manufacturer’s free float handguards.

CNC machined 4140 chromoly steel
Black Nitride/Melonite Quench Polish Quench (QPQ) finish
Chamfered edge, slip on fit
Weighs 2oz
Fits under most free float handguards
USA made steel & Machined in the USA
Internal Diameter 0.750
Includes (2) set screws for a secure attachment
Accepts standard gas tube roll-pins (roll‑pin NOT included)

Palmetto State Armory has the largest selection of AR parts and accessories!