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Aero Precision M4E1 Threaded 20in 5.56 Complete Upper Receiver with Flash Hider APAR700705M48 Caliber: 5.56x45mm NATO, Overall Length: 30 in, 10% Off w/ Free S&H

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 20in, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, Black Anodized, APAR700705M48
Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 20in, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, Black Anodized, APAR700705M48
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Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 20in, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, Black Anodized, APAR700705M48

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Questions & Answers
Can this shoot .223

Any rifle that shoots 5.56 can shoot .223 but no .223 can fire a 5.56 with the exception of .223 Wylde which is optimized for 5.56 and .223. Hope this helps.

by Grease, Verified Owner, July 9, 2025
See 2 More Answers
Does this upper include a bolt Can you answer this question?
View All Q&A You Have a Question? Ask!
Caliber:
5.56x45mm NATO
Overall Length:
30 in
Barrel Length:
20 in
Barrel Profile:
Government
Gas System Length:
Rifle Length
Barrel Twist Rate:
1-7
Threads per Inch:
1/2x28
Muzzle Device:
A2 Flash Hider
Finish:
QPQ Corrosion Resistant
Color:
Black Anodized
Gun Model:
AR-15
Condition:
New
Gas Block Journal Size-Diameter:
.750 in
Handguard Length:
15 in
Included Accessories:
None
Weight:
26 oz, 70 oz

Code: 29D-UFH-AEPATL20-APAR700705M48

MPN: APAR700705M48

UPC: 840014602179

List: $675.00Save 10%
$609.99

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made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Aero Precision M4E1 Threaded 20in 5.56 Complete Upper Receiver with Flash Hider

This complete upper includes our ATLAS R-ONE Handguard. The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our 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.image

WARNING: California`s Proposition 65

Specifications for Aero Precision M4E1 Threaded 20in 5.56 Complete Upper Receiver with Flash Hider:

Manufacturer: Aero Precision
Caliber: 5.56x45mm NATO
Overall Length: 30 in
Barrel Length: 20 in
Barrel Profile: Government
Gas System Length: Rifle Length
Barrel Twist Rate: 1-7
Threads per Inch: 1/2x28
Muzzle Device: A2 Flash Hider
Finish: QPQ Corrosion Resistant
Color: Black Anodized
Gun Model: AR-15
Condition: New
Fabric/Material: Chrome Moly Vanadium
Gas Block Journal Size-Diameter: .750 in
Handguard Length: 15 in
Gun Rail: Picatinny
Gun Type: Rifle
Gun Make: AR Platform
Included Accessories: None
Weight: 26 oz, 70 oz
Magazine Included: No
Country of Origin: USA

Features of Aero Precision M4E1 Threaded 20in 5.56 Complete Upper Receiver with Flash Hider

  • Enhanced forging that gives the upper receiver a "billet look".
  • Picatinny profile that blends seamlessly with our Enhanced Series Handguards.
  • .250 takedown pin holes.
  • Laser engraved T-marks.
  • Includes port door and forward assist installed.
  • Full top picatinny rail for optional attachments.
  • Quick disconnect sling socket at the 3, 6 and 9 o'clock positions.
  • Compatible with low profile gas blocks.
  • Compatible with mil-spec AR15 upper receivers and barrels.

Package Contents:

  • Aero Precision M4E1 Threaded 20in 5.56 Complete Upper Receiver with Flash Hider

What firearm models does the manufacturer say Aero Precision M4E1 Threaded 20in 5.56 Complete Upper Receiver with Flash Hider is compatible with?

The manufacturer suggests that Aero Precision M4E1 Threaded 20in 5.56 Complete Upper Receiver with Flash Hider is compatible with AR-15

Aero Precision M4E1 Threaded 20in 5.56 Complete Upper Receiver with Flash Hider Orderable Models

List of Orderable Models

  • Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 20in, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, Black Anodized, APAR700705M48 , MPN: APAR700705M48 , UPC: 840014602179 , Code: 29D-UFH-AEPATL20-APAR700705M48
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