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Aero Precision M4E1 5.56 NATO No Forward Assist Enhanced Upper Receiver
As Low As $169.99 Save Up to 11%
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Most Helpful Positive Review Perfect receiver if you're looking to build a monolithic upper
Bought this for use with a Jag Composites Bertha carbon fiber handguard which interfaces with the enhanced upper.
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Solid Upper for some

by Esca, Verified Owner from TX, United States Written on September 13, 2025
First, it's an upper, and it seems to be in spec. So there isn't a ton to say beyond the hand guard attachment. I like the thought of offloading the stress of the hand guard off of the barrel nut and on to the upper frame. Does it change anything? I have no clue. I had one of the enhanced hand guard from another build, so this made sense for me. The styling is good. It mates up to my lower with almost no gaps and there is zero movement between the upper and lower when pinned.
Pros:
  • Solid build
Cons:
  • Expensive
Would recommend: Yes
Was it helpful to you? Yes | No

Solid Upper for a Precision Build

by David A., Verified Owner from CA, United States Written on August 22, 2025
Big fan of these Aero-Precision enhanced uppers. This particular upper was used to build a 6mm ARC for PRS gas gun class. Both the design and execution are terrific. This is a heavyweight upper with the enhancement of a oversized attachment for the handguard. This design isa similar to many of the best AR uppers like LaRue, Seekins, Daniel Defense, JP Rifle and others that have the handguard attach to a reinforced receiver rather than the flimsy barrel nut. While the barrel nut design works great for lightweight barrels and shouldered shooting, this upper is idea for heavier precision builds at it is far more ridged....and ridged = precision. Just remember, you must use an Aero Precision enhanced handguard with this upper. Highly recommended, as this makes 8 or ten builds with this upper.
Pros:
  • Great fit and finish
  • Everything fits
  • Very stiff and stable
  • Tight fit for the barrel
  • Seperate barrel nut
Cons:
  • Must use Aero Enhanced Handguard
Best Used for:
  • Precision , target. long range , bench, plinking
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

great purchase

by John, Verified Owner from FL, United States Written on February 7, 2025
Perfect for your next/current build highly recommend!!
Would recommend: Yes
Was it helpful to you? Yes | No

aero enhanced upper

by Rodney Lewis, Verified Owner from NC, United States Written on February 15, 2024
Very happy with the upper and finish. The quality is fantastic.
Would recommend: Yes
Was it helpful to you? Yes | No

great upper slow shipping

by Moyboy, Verified Owner from IA, United States Written on March 16, 2023
AP is a great company, this product is exactly what you’d expect. This is my first time building an AR without a forward assist so we’ll see how it turns out! Very happy with the product, the only gripe is it took a while to finally ship, I do t know what all goes on in the warehouse so I’m sure people weren’t just messing around but shipping things out sooner would be nicer.
Would recommend: Yes
Was it helpful to you? Yes | No
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