• FAST & FREE SHIPPING ON EVERY ORDER
  • WISH LIST
  • CONTACT US
  • FAST & FREE SHIPPING ON EVERY ORDER
Milspec Retail
Login / Register
0 Compare
0 items / $0.00
Menu
Milspec Retail
0 items / $0.00
Browse Categories
  • AR Parts

    • LOWER PARTS
      • Bolt Catches
      • Buffer Tubes
      • Endplates
      • Lower Parts Kits
      • Magazine Releases
      • Pistol Grips
      • Rifle Buffers
      • Rifle Triggers
      • Safety Selectors
      • Trigger Guards
      • Stocks and Braces
    • UPPER PARTS
      • Bolt Carrier Groups
      • Charging Handles
      • Compensators
      • Complete Uppers
      • Flash Hiders
      • Forward Assists
      • Gas Blocks
      • Gas Tubes
      • Muzzle Devices
      • Rails
      • Rifle Barrels
      • Upper Receivers
    NEWLY ADDED
    • BRT M16 Chrome Bolt Carrier Group - 5.56/.223 $209.00
    • BRT 12.5″ OPTIMUM Hammer Forged Chrome Lined Barrel $325.00
    • BRT 16" PRO 5.56 Barrel $199.00

  • AK Parts
  • Pistol Parts
    • Pistol Barrels
    • Pistol Compensators
    • Pistol Lights
    • Pistol Magwells
    • Pistol Sights
    • Pistol Slides
    • Pistol Triggers
    • Pistol Slide Stops & Releases
    • Pistol Magazine Base Plates
  • Shotgun Parts
    • Shotgun Forends
    • Shotgun Grips
    • Shotgun Optic Mounts
    • Shotgun Stocks
    • Shotgun Triggers
  • Firearm Accessories
    • CONTROL
      • Bipods
      • Hand and Finger Stops
      • Rail Covers
      • Vertical Grips
      • Angled Grips
    • OPTICS
      • Sights & Optics
      • Optic Mounts
      • Iron Sights
    • ILLUMINATION
      • Weapon Mounted Lights
      • Weapon Light Mounts
      • Pressure Switches
      • Switch Mounts
      • Pistol Lights
      • Handheld Lights
    • TOOLS
      • Multitools
      • Gunsmithing Tools
    NEWLY ADDED
    • Badger Ordnance Condition One Trijicon RMR Mount $40.00
    • Killer Innovations SIG P320 Magazine Extension $49.99
    • Killer Innovations Glock Magazine Extension $52.49
  • Tactical Gear
    • Back Packs & Bags
    • Chest Rigs
    • Medical
    • Plate Carriers
    • Pouches
    • Slings
    • Training Tools
  • SHOP
    rifle-parts-vert-copy

    RIFLE PARTS

    pistol-parts-vert

    PISTOL PARTS

    gear-vert-1

    GEAR

    accessories-vert

    ACCESSORIES

  • BRANDS
  • NEW ARRIVALS
  • UPDATES
MIL/LE DISCOUNT
  • SUPPORT
    • Contact Us
    • Order Info
    • Track Order
    • Start a Return
    • Cancel Order
-15%
Click to enlarge
Home AR Parts Upper Parts Complete Uppers Aero Precision M4E1 10.5″ 5.56 Complete Upper Receiver w/ ATLAS R-ONE Handguard
Aero Precision

Aero Precision M4E1 10.5″ 5.56 Complete Upper Receiver w/ ATLAS R-ONE Handguard

$459.99 $390.99

This complete upper comes assembled with Aero’s M4E1 Threaded Assembled Upper Receiver and the ATLAS R-ONE Handguard. Includes:

  • M4E1 Threaded Assembled Upper Receiver
  • ATLAS S-ONE Handguard of choice
  • 10.5″ 5.56 CMV Barrel
  • Low Profile Gas Block and Carbine Length Gas Tube
  • Product comes assembled
  • This complete upper does not include BCG or Charging Handle.
  • The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel.
Black
Clear

FREE Shipping in the USA  |   FREE 30 Day Returns

Compare
Add to wishlist
UPC: SKU: N/A Categories: AR Parts, Complete Uppers, Upper Parts
Share:
  • Description
  • Additional information
  • Shipping & Delivery
Description

This complete upper includes Aero’s new 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. Aero’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.

Includes:

  • M4E1 Threaded Assembled Upper Receiver
  • ATLAS S-ONE Handguard of choice
  • 10.5″ 5.56 CMV Barrel
  • Low Profile Gas Block and Carbine Length Gas Tube
  • Product comes assembled
  • This complete upper does not include BCG or Charging Handle.
  • The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel.

M4E1 Threaded Upper Receiver Features:

  • New enhanced forging that gives the upper receiver a “billet look”
  • New Picatinny profile that blends seamlessly with our Enhanced Series Handguards
  • M4 Feedramps
  • .250 takedown pin holes
  • Laser engraved T-marks
  • Includes port door and forward assist installed

ATLAS R-ONE Handguard Features:

  • 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
  • 1.3” Inside diameter
  • 1.5” Outside diameter
  • Compatible with mil-spec AR15 upper receivers and barrels

10.5″ 5.56 Barrel Features:

  • 5.56 Nato 10.5″ Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
  • .750 gas block journal
  • Carbine length gas system, .0785 gas port
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Standard A2 flash hider
Additional information
Brand

Aero Precision

Finish

Anodized

Firearm Compatibility

AR-15 / M4 / M16

Caliber

5.56 NATO / .223 Remington

Barrel Twist

1/7

Size

10.5"

Shipping & Delivery

FREE, FAST SHIPPING

We offer fast, free shipping on every US order. Most orders less than $100 will ship via USPS. Orders exceeding $100 will ship 2 or 3 Day FedEx. You can upgrade any order to 2-Day or Overnight during checkout for an additional charge.

To get your order shipped out same day, checkout before 1:00 PM Pacific time (4:00 PM Eastern).

INTERNATIONAL

Milspec Retail offers worldwide shipping on hundreds of products. However, due to the nature of our business, many products are restricted from export. These items will not be sold to customers located outside of the USA.

Related products

-10%
Compare
Add to wishlist
Add to cart

Rosco Manufacturing 16″ .223 Wylde Purebred Barrel (1/8 Twist)

3 reviews
$195.00 $175.00
OUT OF STOCK
Railscales
Compare
Add to wishlist
Select options

RailScales High Temp Polymer HTP Scales for KeyMod

$30.00
OUT OF STOCK
Compare
Add to wishlist
Select options

RailScales XOS-H Type 1 Rail Covers

$58.00
Compare
Add to wishlist
Add to cart

Rosco Manufacturing 20″ .223 Wylde Purebred Barrel (1/7 Twist)

$230.00
-9%OUT OF STOCK
Compare
Add to wishlist
Select options

Unity Tactical FAST Optics Riser – 2.26″ Height

17 reviews
$99.00 $90.00
Compare
Add to wishlist
Select options

Geissele Super Precision – T1 Series Optic Mount

$110.00 – $135.00
-10%
Compare
Add to wishlist
Select options

Reptilia CQG Grip for AR-15/SR-25, SIG MPX/MCX & FN SCAR

9 reviews
$17.96 – $19.95
-3%OUT OF STOCK
Compare
Add to wishlist
Select options

AAC Blackout 51T Muzzle Brake 5.56MM / 7.62MM

$149.99 $145.00
Aero Precision
Arisaka Defense
Bravo Company USA (BCM)
Emissary Development
Esstac
Ferro Concepts
Geissele Automatics
HRF Concepts
Modlite Systems
Reptilia Corp
SCALARWORKS
Unity Tactical
milspec

The VIP lounge of gun parts and firearm accessories.

Contact us with any questions or inquiries:

Message Us
Phone: (323) 400-2858
Panorama City, CA 91402
SHOPPING
  • Products
  • Brands
  • New Arrivals
  • Sale Products
  • RFQ Bulk Purchasing
CUSTOMER SUPPORT
  • Order Info & Policies
  • Track Order
  • Start a Return
  • Cancel Order
  • Privacy Policy
  • Export Restrictions
COMPANY
  • Contact Us
  • Customer Reviews
  • About Our Company
  • MIL/LE Discount
  • Apply as Vendor
  • Careers
MILSPEC RETAIL COPYRIGHT 2022
visa mastercard amex discover
  • Menu
  • Categories
  • AR Parts
    • Blast Shields
    • Bolt Carrier Groups
    • Braces
    • Buffer Tubes
    • Charging Handles
    • Compensators
    • Complete Uppers
    • Endplates
    • Flash Hiders
    • Forward Assists
    • Gas Blocks
    • Gas Tubes
    • Lower Parts
    • Lower Parts Kits
    • Magazines
    • Mag Releases
    • Mag Extensions
    • Muzzle Devices
    • Muzzle Brakes
    • Pistol Grips
    • Pistol Grips
    • Rails
    • Rail Covers
    • Rail Sections
    • Rifle Barrels
    • Rifle Buffers
    • Rifle Stocks
    • Rifle Triggers
    • Safety Selectors
    • Stocks & Braces
    • Trigger Guards
    • Upper Parts
    • Upper Parts Kits
    • Upper Receivers
  • AK Parts
  • Pistol Parts
    • Base Plates
    • Compensators
    • Magwells
    • Pistol Barrels
    • Pistol Magazines
    • Pistol Sights
    • Pistol Slides
    • Pistol Triggers
  • Shotgun Parts
    • Shotgun Forends
    • Shotgun Grips
    • Shotgun Optic Mounts
    • Shotgun Stocks
  • Firearm Accessories
    • Bipods
    • Grips
    • Finger Stops
    • Hand Stops
    • Lights & Lasers
    • Magazines
    • Sights & Optics
    • Weapon Mounted Flashlights
    • Weapon Light Mounts
  • Tactical Gear
    • Bags & Packs
    • Chest Rigs
    • Medical
    • Plate Carriers
    • Pouches
    • Slings
    • Training Tools
  • MAIN SHOP
  • BRANDS
  • NEW ARRIVALS
  • SUPPORT
    • Contact Us
    • Order Info
    • Track Order
    • Start a Return
    • Cancel Order
  • MIL/LE DISCOUNT
  • Compare
  • Login / Register
Shopping cart
close

Sign in

close

Lost your password?
Or login with
Facebook
Google

No account yet?

Create an Account

FREE SHIPPING TRANSIT TIMES

2-3 DAYS

  • Order value is $100 or more.
  • Shipping address is in the USA.
  • Some large and heavy products excluded.
  • Delivery days do not include Saturday, Sunday, and legal/postal holidays.

3-5 DAYS

  • Order value is under $100 or contains large/heavy products.
  • Shipping address is in the USA.
  • Delivery days do not include Saturday, Sunday, and legal/postal holidays.