Assembled M4E1 5.56 Assm Uppr 16" Mid-Len 12" M-LOK Atlas S-One HG BLK

Name: Assembled M4E1 5.56 Assm Uppr 16" Mid-Len 12" M-LOK Atlas S-One HG BLK
Brand: Aero Precision
Availability: OutOfStock

Aero Precision · Upper Receiver

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Best price

$489.99at Brownells

Out of stock checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$489.99checked Oct 1, 2026	Out of stock	Buy at Brownells

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 Sep 28, 2026.

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Store	Latest	Lowest	Highest
Brownells	$489.99	$489.99	$489.99

Since Sep 28, 2026.

About this part

The Assembled M4E1 5.56 Assm Uppr 16" Mid-Len 12" M-LOK Atlas S-One HG BLK is an AR-15 complete upper receiver from Aero Precision. One store lists it, Brownells at $489.99.

Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Gas system: Mid-length · Handguards
Barrel length: 16" · Handguards
Handguard length: 12" · Barrels

Specifications

Manufacturer: Aero Precision
Color: Black
Type: Complete
Platform: AR-15
Caliber: 5.56 mm NATO

From the manufacturer

This complete upper includes Aero Precision's new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Aero Precision's proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards. M4E1 Threaded Assembled Upper Receiver Choice of 12" or 15" M-LOK ATLAS S-ONE Handguard 16" 5.56 Mid CMV Barrel, 18" Rifle Barrel Low Profile Gas Block and Mid-Length/Rifle Length Gas Tube Dependi Mfg: Aero Precision