8 Best AR-15 Stripped Upper Receivers [2026]

So you're ready to build your own AR-15 upper but aren't sure of the upper receiver?

We've got you covered with our personal go-to mil-spec receiver and a few unique options that will turn heads.

If you haven't read our AR-15 Guide, which goes over all the components of an AR, I'd suggest starting there first.

Now let's dive into what you need to know and our top picks for the best AR-15 stripped uppers!

Best AR-15 Stripped Upper Receivers

1. BCM M4 Upper Receiver

Editor's Pick Upper

BCM M4 Upper Receiver

$129

at BCM

Prices accurate at time of writing

$129 at BCM

Brownells (see price)

AR15 Discounts (see price)

BCM complete uppers and rifles are universally loved (see our review) so you can't go wrong with one of their complete upper receivers.

Everything is mil-spec and the newer versions have their logo stamped in.

T-marks on the Picatinny rails are laser etched and the actual rails are correctly sized.

A note during the barrel installation process...the inside diameter of the barrel extension is slightly undersized so you'll need to loosen it up with a hair-dryer if you're having problems sliding in the barrel.

The end-result is a tighter-fitting and more accurate setup.

If you're set on a stripped version at a nice discount...check out their blemished versions (reviews say that you can barely find anything wrong).

BCM Blem M4 Upper Receiver

$47

at BCM

Prices accurate at time of writing

$47 at BCM

2. Aero Precision M4E1 Stripped Upper Receiver

Best Billet-Looking Upper

Aero Precision M4E1 Stripped Upper Receiver

$127

at AR15 Discounts

Prices accurate at time of writing

$127 at AR15 Discounts

Brownells (see price)

The Aero M4E1 is an upgraded version of the mil-spec stripped upper that gives a billet look without the doubling in price. It is my personal favorite for my builds and is what lives on my home defense gun.

Check out our full review of the M4E1.

Remember to finish out your stripped upper with an upper parts kit, or simply look at assembled uppers which are basically the same price but with the upper parts already installed.

Assembled uppers are great if you want to save yourself a little bit of time and potential stress — no need to scrape anything during installation or go nuts trying to get the dust cover on.

3. Aero Precision No Forward Assist Upper

Best No Forward Assist Upper

Aero No Forward Assist Upper

$103

at Brownells

Prices accurate at time of writing

$103 at Brownells

If you have never used the forward assist and want to shave some weight off or keep it simple, you might consider the no forward assist upper from Aero.

In my opinion, I like the look of the forward assist, and I go by the mantra that I'd rather have it and not use it than need it and not have it --- especially on a more duty rifle build.

4. VLTOR MUR Upper Receiver

Most Durable Upper

VLTOR MUR Upper Receiver

$200

at Brownells

Prices accurate at time of writing

$200 at Brownells

OpticsPlanet (see price)

Rainier Arms (see price)

The VLTOR MUR Upper Receiver has thicker walls to make it a more rigid shooting platform which should translate to more accuracy and durability. Plus, it looks different and cool enough to get some envious looks.

What do you think of the VLTOR? Rate it below!

5. Battle Arms Development Lightweight Upper

Best Lightweight Upper

Battle Arms Development Lightweight Upper

$260

at Brownells

Prices accurate at time of writing

$260 at Brownells

Battle Arms Development (see price)

Rainier Arms (see price)

If you want to go lightweight but not at the expense of extreme lightening cuts and possible reduced reliability, then the Battle Arms Development Lightweight Upper might be a great choice.

Coming in at about 6.3 ounces, this upper is nearly half the weight of a standard Aero M4E1 upper (12.3 ounces).

Plus, the Tron-esque design is sure to catch a few looks at the range.

6. Bootleg Inc Upper Receiver

Best Billet Upper

Bootleg Inc Upper Receiver

$175

at OpticsPlanet

Prices accurate at time of writing

$175 at OpticsPlanet

One of my latest builds uses a Bootleg Upper Receiver with their PicLOK handguard. These come with a low-profile brass deflector, no-forward assist, and captured dust cover pin that eliminates the need for an e-clip.

All that nets you an upper receiver that comes in at a scant 7.2 ounces.

This upper makes for cool and slick build, especially when paired with their adjustable gas BCG (no more switching out your gas block).

If you want something different yet functional, you can't go wrong with the offerings from Bootleg.

7. Icon Defense Forged Upper Receiver

This brand is the brainchild of Mike Miller and Rick Olsen, who have years of experience in firearms.

These guys have brands like Hodge Defense, Killer Innovations, and Sons of Liberty in the resumes, and they applied their machining knowledge to the products of Icon Defense

This stripped upper is forged from 7075 T6 Aluminum and features Type 3 hard coat anodizing. The finish is very nice, but the tolerances are impressive.

Icon Defense says they hold their fit between uppers and lowers at .001".

They claim it's the best fitment in the industry. We assembled a pair and it was snug with zero play whatsoever.

Coming in at 6.94 oz. the Icon Defense upper is lightweight, strong, fits extremely well, and looks great to boot!

Tightest Fitting Upper

Icon Defense Forged Upper Receiver

$113

at OpticsPlanet

Prices accurate at time of writing

$113 at OpticsPlanet

Primary Arms (see price)

Primary Arms (see price)

Best Upper Receiver Parts

Now that you've got the stripped upper receiver...you'll need the parts to finish them out.

Aero is always GTG...

Aero Upper Receiver Parts Kit

$23

at AR15 Discounts

Prices accurate at time of writing

$23 at AR15 Discounts

Upper Receiver Forge Marks

You might have heard about forge marks, which are above the forward assist. These marks designate which metal forging company created the upper blank. The end company (such as Aero Precision) is the one that actually machines the upper into its final state.

Ultimately, the forge mark itself is relatively inconsequential since the quality really comes from the company that machines the blanks.

Frequently Asked Questions

Final Thoughts

Now that you've seen our suggestions for the best AR-15 upper receivers, you're one step closer to your build.

Let us know in the comments below if there is an upper you like that isn't on the list. And if you're ready to build, here's our AR-15 upper assembly visual guide.

Latest Updates

August 18, 2024: Added BCM and removed F1 Firearms. Added info for several picks.