AERO PRECISION M4E1

Posted Jun 14, 2023

Complete Upper Receiver

Introduction

When it comes to AR-15 rifles, the Aero Precision M4E1 Complete Upper Receiver is one of the best and most popular choices available. Aero Precision is known for their high-quality machining and attention to detail, so it’s no surprise that they would put that care into creating what many consider to be one of the most reliable and accurate upper receivers for the AR-15 platform. The M4E1 upper receiver is made from 7075-T6 aluminum and comes with a 16” barrel with a black Melonite finish, as well as a range of features that make it a great option for anyone looking for an upgrade or replacement upper receiver. Let’s take a closer look to see if it measures up to its reputation.

Design and Construction

When it comes to the design of the M4E1, Aero Precision has done an incredible job. The upper receiver is machined from 7075-T6 aluminum and is designed to the Mil-Spec standards, making it a reliable upgrade or replacement for any AR-15. It also has a black Melonite finish which not only looks great but is also incredibly durable and resistant to corrosion. The upper receiver itself is slick-side and features a smooth, low-profile M4 feed ramp for improved reliability and easier loading. It also comes with a forward assist for added reliability.

On the outside, the M4E1 features a classic AR-15 carbine-length gas tube to allow the firearm to cycle faster and more reliably than the standard length gas tube. It also comes with a 5.56 NATO chamber and a 1/7 twist rate which allows it to shoot both .223 and 5.56 NATO ammunition with ease. As far as sights go, the M4E1 comes with its own flat top 1913 Picatinny rail which makes it easy to mount a variety of optics.

Attention to Detail

The attention to detail put into the M4E1 upper receiver is one of the key reasons why it’s one of the most popular models available. For starters, the barrel is made from 4150 chrome moly vanadium steel which is then treated with the black nitride finish for added corrosion resistance. The barrel also has a 5R barrel rifling which helps to improve accuracy and reliability. The rifling is also incredibly easy to clean which is an added bonus.

The handguard is also a standout feature of the M4E1 and is made from 6061 T6 aluminum. It has a full-length M-LOK rail which offers plenty of space for mounting various accessories and it’s also incredibly lightweight. Additionally, the handguard has a number of vents to allow for heat dissipation which is great if you plan on shooting your rifle for extended periods of time.

Final Thoughts

When it comes down to it, the Aero Precision M4E1 Complete Upper Receiver is an excellent choice for anyone in the market for an upgrade or replacement for their AR-15. The attention to detail and quality of machining that Aero Precision is known for has been put into this receiver and it really shows. From the 7075-T6 aluminum build to the 5R barrel rifling to the included M-LOK handguard, the M4E1 stands apart from its competition. If you are considering replacing or upgrading your upper receiver, the M4E1 is definitely worth taking a look at.

Pros & Cons

Pros:

• Professional Looking Finish: Aeroprecision M4E1 rifles have a great-looking finish that many shooters appreciate, with a few custom accents.

• Lightweight: The M4E1 is a lightweight rifle due to its high-quality material, making it easier to carry for long hunting trips.

• Modular Design: Its modular design allows for the addition of several aftermarket accessories, including grips, stocks, steering guards, etc.

• Versatility: This rifle gives you the option of choosing the barrel length of your choice, making it ideal for competition and hunting.

Cons:

• Expensive: The cost of the Aeroprecision M4E1 rifle can be quite expensive, making it difficult for some shooters to purchase.

• Problems with Gas Block: With use, the gas block of the M4E1 can start corroding, which can cause accuracy issues.

• Limited Accessories: Since the modular design of the M4E1 is relatively new, there are not many aftermarket accessories available for it.

Who Should Buy

Anyone looking for an AR-15 style rifle, built to the highest quality standards and with great attention to detail, should consider the AERO PRECISION M4E1. It offers a variety of customization options and is a reliable, dependable rifle. People who are not interested in buying an AR-15 style rifle or do not want to spend a significant amount of money on one should look into other rifle options.

Comparisons

Spec	AERO PRECISION M4E1	SPRINGFIELD HELLION BULLPUP	PALMETTO STATE ARMORY PA-10	PALMETTO STATE ARMORY PSAK47
Caliber	.223 Wylde	.223 Wylde	.308 Winchester	7.62x39mm
Magazine Capacity	30	30	20	30
Barrel Length	16"	16.25"	18"	16.5"
Material	Stainless Steel	Steel	416 Stainless Steel	4150 CMV Steel
Weight	5.5 lbs	7.5 lbs	8.6 lbs	7.45 lbs

Features / Specs

• Mil-Spec Dimensions

• Machined from 7075-T6 Forged Aluminum

• M4 Feedramps

• Type III Hardcoat Anodized Finish

• No Forward Assist

• A2 Flash Hider

• 308 Components are NOT compatible

• Threaded 1/2-28 for 5.56/223

• Threaded 5/8-24 for .308

Popular Accessories

enhanced upper receivers?

The most popular accessories for the AERO PRECISION M4E1 Enhanced Upper Receiver include a lower receiver, an M4E1 Stripped Upper Receiver, an AP 4" or 5.56/.223 Wylde barrel, an AP Enhanced Handguard, an APlower parts kit, an AP charging handle, an AP bolt carrier group, an AP sling mount, an AP Castle Nut, an APEL-U flash hider, an AP Enhanced Gas Block, an AP Gas Tube, an AP Muzzle Brake, an AP Forward Assist Kit, an AP Ambi Safety Selector, an AP Extended Magazine Release, an AP Extended Bolt Catch Release, an AP Extended Takedown/Pivot Pin Set, and an AP Mil-Spec Buffer Tube Kit.

Accuracy

The AERO PRECISION M4E1 is an excellent platform for accuracy and dependability. This firearm is designed for precision, and its accurate performance ensures that it will hit targets at long ranges. The superior operational quality and ultra-tight tolerances of this weapon result in superior accuracy and reliability. It also includes an enhanced upper receiver that features a built-in trigger guard. This allows the shooter to easily maintain a steady grip on the gun and to keep their fingers safely away from the trigger. As a result, the shooter can benefit from superior accuracy and precision. Additionally, the M4E1 comes with adjustable buttstock, allowing the shooter to customize the fit and feel of the gun for a personalized shooting experience. Additionally, a Picatinny mounting system is included to install optics and other accessories, making it a better overall option for precision target shooting.