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Reviews & Ratings for Aero Precision M4E1 Threaded 10in .300 Blackout Complete Upper Receiver with Flash Hider — 24 reviews

(24 reviews)
Aero Precision M4E1 Threaded 10in .300 Blackout Complete Upper Receiver with Flash Hider
Aero Precision M4E1 Threaded 10in .300 Blackout Complete Upper Receiver with Flash Hider
As Low As $499.49 Save 19%
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Most Helpful Positive Review Go to firearm
Let me just preface this review and say I know next to nothing about firearms, that’s the truth. I’ve had this pistol for a couple of months and have shot about two hundred rounds of subsonic and ss learning as much as I can to get comfortable around this compact storm in my hands. Shooting the 300 ...
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Most Helpful Negative Review Not complete?
Threaded 10in .300 Blackout w/ ATLAS S-ONE Handguard Complete Upper Receiver Yup that’s what I ordered! NO charging handle NO Bolt carrier group. How bout the charging handle and bolt carrier group? Then we can call it a complete lower. What happened?
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300 Blackout Pistol Build

by Diamond Dave, Verified Owner from TX, United States Written on July 10, 2025
Purchased this upper for my 300 Blackout pistol build and received it within 10 days of ordering (great free shipping by Optics Planet as ususal!). I haven't completed the build yet, but this is my second Aero purchase (first one was a 556 build) and am very impressed with the new Atlas R-1 handguard, as it's smaller than their previous handguard and feels much better in my hand, as well as shaving some weight off the finished gun. I'm looking forward to running this gun fully suppressed with subsonic ammo.
Pros:
  • None
Cons:
  • None
Best Used for:
  • Home defense
Would recommend: Yes
Was it helpful to you? Yes | No
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Great quality for the price

by Adam, Verified Owner from MN, United States Written on September 26, 2024
For the price (especially with any discount), this upper is excellent. The order shipped quickly, and was received not 5 days after purchase (including a weekend). All machining for the individual parts was correct, and I did not find any defects or imperfections. 500 rounds in and I’m quite satisfied with this complete upper from Aero Precision.
Would recommend: Yes
Was it helpful to you? Yes | No
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NOT A CONPLETE UPPER RECEIVER

by Frost, Verified Owner from TX, United States Written on September 11, 2024
I wanted this style upper receiver for a while now, I browsed so quickly and just read “complete upper receiver” that I just bought it.
To my surprise no charging handle or BCG, for the price it should’ve been included.
Would recommend: No
0 of 4 found the following review helpful.
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Solid Upper, but not perfect

by RicSpen1911, Verified Owner from IN, United States Written on May 16, 2024
I haven’t shot this yet, but expecting great things. One issue I’ve noticed, when assembling it requires a little bit of finagling and pressure to get it on/off your lower. My lower is also an AP lower. Not a major issue, but could be easier since it’s the same brand.
Would recommend: Yes
Was it helpful to you? Yes | No
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300 blackout upper

by Charles, Verified Owner from TX, United States Written on April 11, 2024
Good build quality, shoots great right away. Shot both subsonic and supersonic ammo without fail. It’s only 25 yards, but subsonic ammo grouped into one hole.
Would recommend: Yes
Was it helpful to you? Yes | No
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AERO M4E1 complete upper

by quiller, Verified Owner from MA, United States Written on March 14, 2024
I have several AERO uppers and all work great. I prefer to buy completes as it typically save money and time. The fit and finish is great and I really like not having continuous top rail as it’s easier to get a grip IMO. I’ll buy AERO again and from Optice Planet. In stock and fast shipping. Win, win in my books.
Would recommend: Yes
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Good product for a good price.

by TX Gun Guy, Verified Owner from TX, United States Written on February 27, 2024
Finally got a chance to run this upper through a range day. After 200 rounds, I only had one hiccup (a bolt override!). Otherwise it functioned flawlessly. Build quality is solid. It ran supers and subs without issue. For the price I paid, I feel like I received a good vaue.
Pros:
  • good price
  • Good build quality
  • Decent Accuracy
  • No issues with a suppressor
Cons:
  • Lacks iron sights or BCG
Best Used for:
  • Target shooting
  • Home defense
Would recommend: Yes
1 of 1 found the following review helpful.
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Aero M4E1 .300 Blackout Upper FDE

by Funkybunch, from PA, United States Written on January 19, 2023
Purchased to mate to an Aero Precision M4E1 lower also in FDE. FYI, with the cerakote, the takedown pins are really tight. Will need a punch to take down. Reading online, seems like a common issue and will work itself out will use. So be advised, nothing to worry about. Love the look.
Would recommend: Yes
Was it helpful to you? Yes | No
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Works great

by Will, from MI, United States Written on December 8, 2022
Added the aero pro BCG, and a radian raptor. Ran 125, 147, and 200 supers to check it out. Worked well, finish and assembly was good. Everything you can ask for at the price point. would buy it again after using it, nice compact package.
Pros:
  • Quality and price
Cons:
  • none for me
Best Used for:
  • Range, PDW
Would recommend: Yes
1 of 1 found the following review helpful.
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Aero Uppers

by BRH, from PA, United States Written on July 28, 2022
Quite simply one of the best uppers you can find for the cost you pay. I’ve used many other companies and you can spend over $1000 for similar products. I’ll never spend that kind of money again because Aero is the right product for the right price. I find that most of the bad product reviews are written by people who truly don’t know how to put things together.
Would recommend: Yes
3 of 3 found the following review helpful.
Was it helpful to you? Yes | No
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