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Questions & Answers
I bought this receiver and a Faxon 223 Wylde pencil barrel. The barrel doesn't fit in the receiver. Is one of them out of spec or is that normal? Expert Answer

Please email us at techsales@opticsplanet.com regarding the problem you are having with the Aero Precision M4E1 Stripped Upper Receiver.

by Hunter, Gear Expert, September 16, 2022
Can anyone tell me how the fitment is with a psa lower?

Mine fits it totally fine.

by Matt s, Verified Owner, December 26, 2021
Customer Reviews
Helpful Positive Review Aero M4E1 Upper by Ray, June 17, 2019
Fit and finish was what one would expect from Aero Precision, this upper and lower from the same company complamented the build. It shots lights out and look just as good as it shoots. Love the the fact that there's no pins to knock in. They were rep...
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3/4 found this helpful
Helpful Positive Review Awesome upper by buck, Verified Owner, April 22, 2019
Threaded forward assist pin makes installing forward assist even more easier. Great finish. Design is modern. If you like Strike Industry's dust covers, you'll have to shave off a little polymer from the edges so it'll fit this upper. Matches the M4E...
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2/2 found this helpful
Helpful Negative Review crapola to the max by GI Joe, Verified Owner, October 30, 2020
lets see 1st you can only insert ejection port cover in one direction ...am 70 years old and it had taken me quite a while to get the #$%@ cover installed ...then i went to install forward assist ...oh no ....some idiot drove a pin into ejection port...
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8/49 found this helpful
Most Recent Reviews Excellent match with M4E1 lower by Greg L, Verified Owner, January 1, 2025
I have several of these uppers and now it’s all I build on. I really like the combo with the M4E1 lower as it has the adjustment to keep everything nice and tight. Finish has held up very well. I’m not particularly gentle with my rifles and it’s sti...
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Most Recent Reviews Best place to shop! by Merm, Verified Owner, December 13, 2024
I love optics planet. They have great products and a very wide variety of priced parts. They have great deals and great customer service. HIGHLY RECOMMEND!!!!
Most Recent Reviews aero precision by millo, Verified Owner, April 10, 2024
this is my second aero upper reciever... cant complain or inferfection on... best mid or budget build your trying to do on an ar... i will recommend this upper to anyone...
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TRYBE Defense AR15 Rifle Barrel, .223 Wylde, 18in, Medium Profile, 1-8 Twist, 1/2x28 Thread, Black, BARRIF18223
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Product Info for Aero Precision M4E1 Stripped Upper Receiver 223 Remington/5.56 NATO

Boost your rifle build with this high-quality Aero Precision M4E1 Stripped Upper Receiver 223 Remington/5.56 NATO. These AR15 Upper Receivers made by Aero Precision are machined from rugged, lightweight 7075-T6 aluminum with your choice of finish that further enhances their strength and resistance to corrosion and abrasion. The Aero Precision M4E1 Stripped Upper AR15 Receiver sports a Picatinny Profile that blends perfectly with their ATLAS Series of handguards. Install an Aero Precision M4E1 Threaded Stripped Upper Receiver to create an improved shooting experience for nearly any application.image

Specifications for Aero Precision APAR700201C M4E1 Stripped Upper Receiver 223 Remington/5.56 NATO :

Mfg Item Num:  APAR700201C
Supplier SKU:  100539
Category:  UPPERS
Receiver Finish:  Black Hard Coat Anodized
Type:  Stripped
Caliber:  223 Remington/5.56 NATO
Sights:  None, Optic Ready
Receiver Description:  7075-T6 Aluminum

Features of Aero Precision M4E1 Stripped Upper Receiver 223 Remington/5.56 NATO:

  • Enhanced forging that gives the upper receiver a "billet look"
  • Picatinny profile that blends seamlessly with our Enhanced and ATLAS Series Handguards
  • M4 Feedramps
  • .250 takedown pin holes
  • Laser engraved T-marks
  • Includes threaded forward assist roll pin
  • DOES NOT include port door or forward assist

Package Contents:

  • Aero Precision M4E1 Stripped Upper Receiver 223 Remington/5.56 NATO

Aero Precision M4E1 Stripped Upper Receiver 223 Remington/5.56 NATO Orderable Models

List of Orderable Models

Aero Precision M4E1 Threaded Stripped Upper Receiver 223 Remington/5.56 NATO, 7075-T6 Aluminum, Black Anodized, APAR700201C , MPN: APAR700201C , UPC: 815421023756 , Code: 29D-UPR-M4E1STU-APAR700201C
Aero Precision M4E1 Threaded Stripped Upper Receiver,FDE Cerakote, APAR700202C , MPN: APAR700202C , UPC: 840014600045 , Code: 29D-UPR-M4E1STU-APAR700202C

Aero Precision M4E1 Stripped Upper Receiver 223 Remington/5.56 NATO Unavailable & Discontinued Models

List of Unorderable Models

USED, Aero Precision M4E1 Threaded Stripped Upper Receiver 223 Remington/5.56 NATO, 7075-T6 Aluminum, Black Anodized, APAR700201C , MPN: APAR700201C-EDEMO , Code: 29D-UPR-M4E1STU-APAR700201C-EDEMO-OT-U
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