Top 5 Best Upper Receivers for .458 SOCOM Rifle (2020)

If you are planning to build your first AR-15 chambered .458 SOCOM rifle, you have quite the project ahead of you.

Although there are is a sheer abundance of parts and accessories available for the more popular calibers like the 5.56mm NATO, the .308 Winchester, the 6.5 Creedmoor, and the .300 Blackout, finding the best .458 SOCOM upper receiver is going to be more difficult as it is a rarer round with fewer available parts on the market.

Nonetheless, the .458 is still an impressive round by itself and the reduced amount of options available for parts on the market should not stop you from building your very own .458 SOCOM rifle.

Factors to Consider for A Great Upper Receiver

Durability

The .458 SOCOM is available across a wide variety of bullet grains and weights from 250 grains to 600 grains. This could make your search in finding the best .458 SOCOM upper receiver a little complicated as some upper receivers are specifically designed to handle lighter bullet weights and vice versa.

The .458 SOCOM comes with great power. With great power, comes great durability. If you’ve chosen an ill-designed upper receiver, you will be faced with a lot of problems in the long run. If you are planning to use 250-grain rounds, you will need a tougher upper receiver for that.

Range

The .458 SOCOM wasn’t designed to be the most precise round especially at long distances i.e. 1000 yards. However, who doesn’t want their .458 SOCOM rifle to be as accurate as possible right?

Compatibility

The .458 SOCOM round was designed to achieve excellent compatibility with the 5.56 AR as much as possible. Traditionally, a .458 SOCOM upper receiver was supposed to fit perfectly on a 5.56mm NATO lower receiver. If you already own a 5.56 lower receiver, you should make sure that the .458 SOCOM upper receiver you’ve selected would fit your lower.

Top 5 Best .458 SOCOM Upper Receivers

1. ​Cross Machine Tool Co., Inc. – AR-15/M16 458 SOCOM Billet Upper

Specifications

  • Cartridge: 458 SOCOM
  • Finish: Black
  • Style: Stripped
  • Made in the USA
  • T6 7075 billet aluminum
  • Hardcoat anodized
  • Matte black finish
  • AR-15

Features

The Cross Machine Tool Co., Inc. – AR-15/M16 458 SOCOM Billet Upper is constructed from the well known T6-7075 billet aluminum along with a hard coat anodization and matte black finish. With all these features, you know that this .458 SOCOM upper receiver is able to offer you the exceptional durability that you need for a .458 SOCOM round.

Besides being durable in terms of handling the raw power and recoil of a .458 SOCOM round, the Cross Machine Tool Co., Inc. – AR-15/M16 458 SOCOM Billet Upper would also resist corrosion and moisture for many years to come as well. Furthermore, the matte black finish on this upper receiver would make your rifle stealthy at close ranges by reducing reflection.

In terms of design, the Cross Machine Tool Co., Inc. – AR-15/M16 458 SOCOM Billet Upper was specifically designed with an expanded ejection port to be compatible with other lowers of big-bore calibers besides the .458 SOCOM round. In addition, this upper features M4 feed ramps which are compatible with any standard bolt carrier, charging handle, and barrel nuts.

Not only does the Cross Machine Tool Co., Inc. – AR-15/M16 458 SOCOM Billet Upper’s larger ejection port come with excellent reliability by design, it also provides you with quick access to remove spent casings in cases of occasional jams.

If you are building your first rifle, you might think you’ll need the professional services of a gunsmith to put the parts together for you. With the Cross Machine Tool Co., Inc. – AR-15/M16 458 SOCOM Billet Upper, the installation would be a breeze and you will find the perfect and solid fit.

In terms of pricing, the Cross Machine Tool Co., Inc. – AR-15/M16 458 SOCOM Billet Upper is available on brownells for only $115.99. Available at such a price tag, most users would be comfortable in spending this amount for such an amazing .458 SOCOM upper receiver.

You will like this product if:

You are shopping on a tight budget. As mentioned earlier, this amazing .458 SOCOM upper receiver is available on Brownells for an affordable price tag of only $115.99. Along with all its amazing features, you will find incredible value with this .458 SOCOM upper receiver.

You want great compatibility. The Cross Machine Tool Co., Inc. – AR-15/M16 458 SOCOM Billet Upper was specifically designed to work well with lowers of big-bore calibers besides the .458 SOCOM round. In addition, this upper features M4 feed ramps which are compatible with any standard bolt carrier, charging handle, and barrel nuts.

You want something that’s built to last. The Cross Machine Tool Co., Inc. – AR-15/M16 458 SOCOM Billet Upper is constructed of T6-7075 aircraft-grade aluminum that’s tough as nails and is able to resist corrosion from shooting under unfavorable weather conditions.

You might not like this product if:

You want more bells and whistles. The Cross Machine Tool Co., Inc. – AR-15/M16 458 SOCOM Billet Upper is essentially a basic .458 SOCOM upper receiver that features solid construction and a reasonable price, it doesn’t offer much in terms of extras (charging bolt/bolt carrier).

2. ​Radical Firearms 10.5″ 458 SOCOM Complete Upper Receiver

Specifications

  • 10.5″ 458 SOCOM 4140V Barrel With Melonite Coating
  • 1 in 14″ Twist Rate
  • 5/8×32 TPI
  • 458 SOCOM Chamber
  • Single Feed Ramp
  • .936″ Gas Block
  • Stainless carbine-length gas tube
  • Direct Gas Impingement
  • Radical Firearms Panzer Brake
  • Radical Firearms 9″ FHR Hybrid Rail System
  • Integrated Keymod attachment points on the sides and bottom with Picatinny Rails at the fore-end for Mounting Lights, Lasers, Bipods & Sights
  • MIL-STD Forged Upper Receiver with RF Dimpled Forward Assist, Shell Deflector, Dust Cover
  • Complete 458 SOCOM, Melonite Coated
  • MIL-STD Charging Handle
  • Big Bore Magazine

Features

The Radical Firearms 10.5″ 458 SOCOM Complete Upper is useful for a wide range of shooters. This .458 SOCOM upper receiver could be applied from hunting to casual target shooting purposes. Most shooters who have had their hands on this upper had nothing but great things to say about the upper in terms of its reliability and built quality.

If you are looking for a complete .458 SOCOM upper receiver, the Radical Firearms 10.5″ 458 SOCOM Complete Upper would be a great option for you. If you didn’t know, Radical Firearms is widely known for being one of the best firearm manufacturers by consistently producing top-notch products, and this upper is no exception.

Coming with a length of 10.5’, this .458 SOCOM upper receiver would be a great fit for you if you are planning to build a short-barreled rifle. In relation to compatibility with different .458 SOCOM rounds, this upper receiver would work well with every .458 SOCOM round you can find, regardless of its weight.

Besides from getting one of the best fully-assembled .458 upper receivers on the market, the upper also comes with a forward assist, a custom ejection port door, and a 10.5’ barrel that features the all-new Panzer muzzle brake to tame the mighty .458 SOCOM’s might as you shoot.

In addition, the Radical Firearms 10.5″ 458 SOCOM Complete Upper would also come with a BCG and a charging handle, making it one of the best selling points of this .458 SOCOM upper receiver.

In terms of construction, the Radical Firearms 10.5″ 458 SOCOM Complete Upper has a brilliant construction as it is forged with mil-spec standards. The barrel is a 4140V barrel along with premium melonite coating with a 14’ twist rate. Besides that, you will also be getting a .936’ gas block and a stainless full carbine-length gas tube that features direct gas impingement.

In relation to its accessories, you will be getting the Radical Firearms 9’ FHR Hybrid Rail System along with a set of integrated Keymod attachments at the bottom, sides, and the Picatinny rails at the fore-end. If you are a tactical shooter, mounting sights, lights, and lasers are going to be a breeze with this upper.

You will like this product if:

You want a complete .458 upper receiver. As mentioned above, .458 SOCOM parts could be pretty hard to find as they aren’t quite as popular as the other cartridges. Hence, getting a complete .458 upper receiver would save you the hassle of looking for BCGs and a charging handle.

You want something that’s built to last. The upper receiver is mil-standard forged and it comes with a 4140V barrel with melonite coating. This is a brilliant combination of materials if you are looking for a durable .458 SOCOM upper receiver.

You are a tactical person. The Radical Firearms 10.5″ 458 SOCOM Complete Upper is able to support a wide range of accessories thanks to its hybrid rail, keymod, and Picatinny rail. Besides that, the barrel also comes with a Panzer Muzzle Brake to resist the might of the .458 SOCOM round.

You might not like this product if:

You want a basic upper receiver. For some shooters that are only looking for a more basic .458 SOCOM upper receiver, the Radical Firearms 10.5″ 458 SOCOM Complete Upper might be a little too much.

3. Anderson Manufacturing – 458 SOCOM Stripped Upper

Specifications

  • Cartridge: 458 SOCOM
  • Finish: Black
  • Style: Stripped
  • Made in the USA
  • The receiver comes completely stripped
  • Color: Black
  • Comes with durable hard-coat anodized finish

Features

If you are looking for one of the best stripped .458 SOCOM upper receivers that would allow you to the pleasure of assembling your rifle piece by piece, you will love the Anderson Manufacturing – 458 SOCOM Stripped Upper.

Going back to the more traditional solution, Anderson Manufacturing has a wide range of components for you to choose from to complete your .458 SOCOM rifle, and this upper receiver would mark a good start. Having specifically designed to unleash the .458 SOCOM round’s full potential, you won’t regret shooting with this upper receiver.

Constructed from aircraft-grade 7075-T6 forged aluminum, Anderson Manufacturing has made sure that this .458 SOCOM upper receiver would be as tough as it can get. Along with a hard-coat anodized finish and a100% reflection-resistant shade of black, you can place your trust on this upper receiver especially in self-defense and hunting scenarios.

If you are a tactical shooter, the last thing that you’d want from your .458 SOCOM rifle is to see it getting dinged up and badly damaged from extended periods of shooting on the range.

Anderson Manufacturing knows that and has integrated a wider ejection port to give you the reliability you need on the range, along with the capability to easily remove the spent casings when your gun jams.

While the Anderson Manufacturing – 458 SOCOM Stripped Upper’s barrel extension features a large relief for feeding, there are no feed ramps. This upper comes with the standard-sized pins that will easily fit any standard dust covers.

In terms of its pricing, Anderson Manufacturing has made a name for itself by creating high-quality products at a reasonable rate. Therefore, you won’t have to worry about breaking the bank when purchasing the Anderson Manufacturing – 458 SOCOM Stripped Upper.

You will like this product if:

You want excellent value. Coming with a price tag of around $70, it’s probably going to be one of the cheapest .458 upper receivers you are going to find on the market. If you think great things always come at an expensive price, Anderson Manufacturing is here to prove you wrong.

You want to fully customize your .458 SOCOM rifle. The Anderson Manufacturing – 458 SOCOM Stripped Upper is stripped down and will provide you with the perfect solution for a fully custom made .458 SOCOM rifle.

You want great reliability. The Anderson Manufacturing – 458 SOCOM Stripped Upper had received tons of great reviews in terms of its excellent reliability. This is all thanks to Anderson Manufacturing’s wide ejection port design to prevent any jammings.

You might not like this product if:

You want a fully assembled upper receiver. The Anderson Manufacturing – 458 SOCOM Stripped Upper might not be your best buy if you don’t want to be spending too much time in building a fully-custom .458 SOCOM rifle.

4. ​Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM

Specifications

  • Cartridge: 458 Socom
  • Finish: Black
  • Style: Mil-Spec
  • Made in the USA
  • Made for AR-15s
  • Compatible with Mil-spec parts
  • Compatible with most aftermarket handguard/rail systems
  • Enlarged ejection port compatible with 458 SOCOM
  • Lifetime warranty against manufacture defects
  • Comes stripped without dust cover & forward assist assembly
  • Compatible with “Tactical Link” Enhanced Battery Assist Lever

Features

If you hunt a lot, you will love the thick profile of the ​Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM. Many shooters really enjoyed shooting their .458 SOCOM rifle with this upper receiver thanks to its extreme sturdiness that allowed them to fit almost any accessories they needed without disorganization issues.

If you really love mil-spec .458 SOCOM upper receiver, the ​Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM will be the closest you can get to getting a mil-spec upper receiver. Furthermore, this .458 SOCOM upper receiver is also compatible with all mil-spec and aftermarket parts that you already have your eyes on. As such, you won’t have compatibility issues.

The Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM features a pretty tough built. Constructed from aircraft-grade 7075-T6 aluminum with a mil-spec Type 3 hard-coat anodized black finish, you know that this .458 upper was built to last from its extreme corrosion and reflection resistance.

Furthermore, the Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM also comes with a slightly larger ejection port for smoother round ejections to prevent occasional jamming issues. In terms of overall reliability, all of these features add up to make this .458 SOCOM upper receiver one of the best uppers in the market.

In terms of accessories, the Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM comes with M4 feed ramps, a 1913 Picatinny rail flat-top, a shell deflector, a forward assist machined into the receiver, and a dust cover port machined into the receiver. As such, you won’t have any issues if you are a tactical shooter.

In relation to compatibility, the Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM would work nicely with just about any aftermarket handguard, rail system, and mil-spec aftermarket parts. Besides that, this .458 SOCOM upper receiver is also compatible with the Tactical Link Enhanced Battery Assist Lever.

One of the best selling points of the Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM is perhaps its lifetime warranty against any defects by the manufacturer – Cross Machine. As such, you can now purchase this amazing .458 SOCOM upper receiver without doubts about any manufacturer defects that’d spoil your gun building plans.

You will like this product if:

You want something that’s easy to install. With the Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM, you won’t need the professional services of a gunsmith to put your .458 SOCOM rifle parts together as this upper receiver is extremely easy to install.

You want great compatibility. The Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM is compatible with just about any mil-sec and aftermarket parts that you can find that’s compatible with the .458 SOCOM round.

You want a .458 upper receiver that’s built to last. The Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM comes with a generous lifetime warranty against any of the manufacturer’s defects. This definitely serves as a statement about Cross Machine’s high standards in producing great quality products.

You might not like this product if:

You are looking for a complete/stripped upper. As the Cross Machine Tool – AR15 CMT Billet Upper Receiver .458 SOCOM strikes a nice balance between a complete and stripped .458 upper receiver, it kind of sits in the middle. If you are looking for either one, this .458 upper receiver might not be your best option.

5. ​Tromix .458 SOCOM Complete Assembled Upper

Specifications

  • Available in Black 4150 Chromoly steel or 416 Stainless steel options
  • Includes black 4150 Chromoly barrel
  • Black flash hider
  • Black gas block
  • Bolt/carrier
  • Charging handle, with plastic GI handguards
  • 5/8-24 except for the 16″ unthreaded model
  • The standard twist is 1:14

Features

The Tromix .458 SOCOM Complete Assembled Upper is perhaps one of the easiest .458 SOCOM upper receivers to assemble as all the vital parts would come along with the upper receiver. Instaling it would also be a breeze as you can easily do it yourself at home without the use of any special equipment and the professional services of a gunsmith.

If you are looking to modify your existing .458 SOCOM rifle to bring its accuracy to the next level, the Tromix .458 SOCOM Complete Assembled Upper would be what you would want. Many shooters experienced a significant improvement in terms of their .458 SOCOM rifle’s overall accuracy and recoil.

One of the great features of the Tromix .458 SOCOM Complete Assembled Upper is that it would already come completely assembled. That said, if you wish to make any modifications to the Tromix .458 SOCOM Complete Assembled Upper, you can easily do so. Hence, it strikes 2 birds with a single stone.

Although the Tromix .458 SOCOM Complete Assembled Upper comes fully assembled, Tromix gives you the option to add any additional accessories that are sold separately, but compatible with the Tromix .458 SOCOM Complete Assembled Upper so you won’t have to shop for other accessories while hesitating about its compatibility.

If you are also looking for a muzzle brake, a suppressor, or any other accessories to enhance your .458 SOCOM rifle’s overall performance, you will enjoy shopping with Tromix as they make shopping easy even for some of the rarest accessories for the .458 SOCOM.

The Tromix .458 SOCOM Complete Assembled Upper’s barrel is relatively long and comes with a pretty rugged design. Furthermore, the upper’s Picatinny rail is extremely spacious and would offer you the space that you need to install several tactical accessories.

The Tromix .458 SOCOM Complete Assembled Upper comes with a wide range of options that are available for the upper’s barrel length and type. These include carbon steel or 416 stainless steel for the material, and barrel lengths ranging from 8’ to 16.6’. Besides that, you will also have to option to choose between weight options to suit your personal preferences.

Moreover, Tromix would also provide you the option to select between 5 types of M-Lok handguards or 2 freely floating tubes or to opt for an ambidextrous charging handle. In addition, you can also add an ejection port that’s specifically designed for the .458 SOCOM and a muzzle brake port in either black or stainless.

If you want to go the extra mile, you can even choose to add a stainless or black radial compensator or Tromix’s 3 different types of linear compensators. You can also select from tank brakes and opt for a thread protector or a simple flash hider. In relation to the bolt, you also have the option to upgrade the bolt to a nickel boron bolt, and your gas block to stainless steel.

From the above review, you can see that Tromix really went the extra mile in making sure you will be able to get a fully customized and assembled .458 SOCOM upper receiver. You might think that the sheer options available on Tromix would take you forever to build your .458 SOCOM rifle, but Tromix is widely known to be fast and your orders will be sent out within 1 or 2 working days.

You will like this product if:

You want premium parts. From the description above, most could already tell that the Tromix .458 SOCOM Complete Assembled Upper has all the premium Tromix parts you want. Besides that, it’s also way cheaper than having a gunsmith to assist you with your custom build.

You want a fully customized and assembled upper receiver. The Tromix .458 SOCOM Complete Assembled Upper has a wide range of options for your custom .458 SOCOM rifle build. And the best thing is, all of these parts are assembled for you so you won’t have to do it yourself.

You might not like this product if:

You want great versatility between brands. Although Tromix offers a wide range of accessories and parts that would work perfectly with the Tromix .458 SOCOM Complete Assembled Upper, you will be limited to only Tromix components. If you have some accessories from other manufacturers in mind, this won’t be your best buy.

You are shopping on a budget. Although it is still way cheaper than having a gunsmith to build your .458 SOCOM rifle for you, it would still cost more than other .458 SOCOM upper receivers due to the fact that all of Tromix’s components are of premium quality. With premium-quality products, they usually come with a premium price.

FAQ

Are all .458 SOCOM upper receivers the same?

No.

When it comes to upper receivers, they are usually not interchangeable. To many shooters, this is pretty obvious as when you’d want to camber a different caliber, you will have to switch off the upper receivers.

Just like your other calibers, one of the most important factors when purchasing a .458 SOCOM upper receiver is deciding between a complete or a stripped upper. If you didn’t know, a complete upper might be an overkill in some cases to many amateur shooters; while a stripped upper might be a little too naked for a veteran shooter.

Therefore, one of the most important factors is to decide whether you are looking for a stripped or a complete .458 upper. If you have your eyes on a complete upper receiver, it’s important for you to check that you are getting the specific parts that you want, i.e. proper barrel length, and weights.

There will be some problems if you purchased a complete upper with the wrong barrel length or some other parts that you don’t wish to see on your build.

What is the .458 SOCOM good for?

Traditionally, the .458 SOCOM round is widely known to be great for hunting purposes. Besides that, you can also use it to shoot targets at around 100 yards effectively with the .458 SOCOM.

Will a .458 SOCOM round fit on a .223 lower?

The .458 SOCOM round is compatible with any lower receiver that’s able to discharge the .223 rounds IF they are loaded in standard magazines that chambered to accommodate both the .458 SOCOM and the .223 round.

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