+1-800-504-5897 Live Chat Help Center Check Order Status
About Us Policies Reviews How To
FREE SHIPPING & FREE RETURNS*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Reviews & Ratings for Aero Precision M4E1 16in .300 Blackout Barrel Complete Upper Receiver with Flash Hider — 12 reviews

(12 reviews)
Aero Precision M4E1 16in .300 Blackout Barrel Complete Upper Receiver with Flash Hider
Aero Precision M4E1 16in .300 Blackout Barrel Complete Upper Receiver with Flash Hider
As Low As $419.99 Save Up to 27%
View Product
Write a Review
Compare (0)
1 item has been added
Add at least two items to compare
Most Helpful Positive Review Awesome AERO 300 blackout upper M LOCK
I put together a 300 black out all Aero parts night force scope with suppressor. I am very impressed with the quality. I have put 60 rounds threw the gun performed very well every thing fit together perfectly I would definitely recommended Aero products
Show
Sort by
Filter by

Fit and finish are perfect

by Dirty, Verified Owner from PA, United States Written on May 24, 2025
Love this upper for the price. Put it on an old Bushmaster lower and feeds flawlessly. I’m using bulk mass produced off brand .300 and haven’t had an issue yet. Would definitely recommend.
Pros:
  • None
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No
Share

Favorite upper !

by Chris, Verified Owner from LA, United States Written on June 26, 2024
I have put 1500 rounds thru this upper with out a single hiccup . Ole girl paired with Aero lower and she runs with a h buffer and jp spring . She never gets tired of spitting so I try to keep her full and cool .
Would recommend: Yes
3 of 3 found the following review helpful.
Was it helpful to you? Yes | No
Share

Aero precision M4E1 300 Blackout quad rail barrel

by John, Verified Owner from VA, United States Written on April 28, 2024
This is the perfect barrel for my PDW build. being a complete upper receiver/barrel combo makes this a whole lot easier, quicker and with AeroPrecisions high quality. Along with being very affordable you can’t bet Opticsplanet value and ease of service for your build.
Pros:
  • affordable, high quality and quick turnaround on orders
Cons:
  • limited color selection
Best Used for:
  • personal defense weapon and general all around shooting, hunting
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No
Share

Great .300 AAC BLK 16" Upper

by wisegsmith, Verified Owner from FL, United States Written on October 5, 2022
The Aero Precision M4E1 16" .300 Blackout Barrel Complete Upper Receiver is great. The EM-15 handguard is excellent and highly functional. This is the best AR-15 upper I own, and I highly recommend it to anyone wanting a high quality .300 AAC Blackout 16" barrel complete upper receiver.
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No
Share

Aero 300 blackout upper

by BRH, from PA, United States Written on November 24, 2021
Very nice fit & finish. Would recommend over many other uppers. The finish seems very thick on the metal & the attention to detail is extremely nice to see. My model is a 16 inch barrel with a 15 inch m lock style cover.
Would recommend: Yes
2 of 3 found the following review helpful.
Was it helpful to you? Yes | No
Share

Aero Precision M4E1 16in .300 Blackout

by Hog Hunter, Verified Owner from TX, United States Written on October 19, 2019
All I can say is customer service is very good never had an issue with these guys. Lamar Young what's great... Shipping was very fast. Put it together on Thursday took it to the range very happy with the way it shoots.
Would recommend: Yes
2 of 2 found the following review helpful.
Was it helpful to you? Yes | No
Share

Great upper and awesome service through Optics Planet.

by Hannahbull, from TX, United States Written on April 27, 2019
I ordered an Aero Precision m4e1 300 blackout complete upper from Optics Planet which was my first time ordering anything from them. I have always used other sites but I will start doing all my business with O.P do to their blazing fast delivery and top notch customer service. I gotta give Dewan, the c.s. rep a 5 star rating for his professionalism which helped a lot. First time order from them and on board for all other future orders.
Pros:
  • C.S. was top notch, second to none
  • Shipping was super fast
  • Price's were lower than the main online competition by quite a bit.
Cons:
  • none!
Would recommend: Yes
3 of 3 found the following review helpful.
Was it helpful to you? Yes | No
Share

Great Quality 300 Blackout Upper, Lightweight and sleek

by howl, from ID, United States Written on March 11, 2019
Really love this aero precision 300 blackout upper, very sleek and lightweight, perfect way to upgrade and modernize an AR15. Fits my Rock River Arms 223/556 lower perfectly looks like a new rifle. Love the rail upper picatinny and 3/4 MLOK.
Pros:
  • Quality
  • cost
  • Weight
  • Design
Cons:
  • None
Would recommend: Yes
5 of 5 found the following review helpful.
Was it helpful to you? Yes | No
Share

Aero Precision M4E1 Complete Upper .300 Blackout Barrel

by DM, from OK, United States Written on November 8, 2017
The Aero Precision M4E1 Complete Upper .300 Blackout Barrel is very light and easy to maneuver. With 110 grain Barnes TAC, accuracy is approximately 1 MOA at 100 yards. Subsonic 220 grain bullets CYCLE with a suppressor, however you may have to work on getting subsonic ammo to cycle without a suppressor. Excellent product for the price. Solid lock-up for the barrel.
Pros:
  • Accurate, Light Weight, Machined, Cosmedically Appealing, Fits Mil Spec., Locks up nice wit RRA lower.
Cons:
  • None. Quality product for the price.
Best Used for:
  • Home Defense, Hunting, Target Practice, Suppressor Use.
Would recommend: Yes
4 of 4 found the following review helpful.
Was it helpful to you? Yes | No
Share

Aero precision m4e1 upper 300 blackout

by Pepe, Verified Owner from FL, United States Written on March 2, 2017
Very good upper in FDE, no scratches or blemishes and very easy to clean with minor effort. I am not crazy about the quad rail but like that it doesn't run all the way back, making it more comfortable to hold with my support hand. I have a MI mlok slim handguard gen2 on my 556 upper and prefer that better over the quad rail, thats why I gave this 4 stars.
Would recommend: Yes
0 of 4 found the following review helpful.
Was it helpful to you? Yes | No
Share
There are no reviews that match your criteria. Would you like to review this product?