What is 7.62 X39 Upper? π§
It refers to the upper receiver part of an AR-15 rifle that is designed to handle and fire the 7.62x39mm cartridge. This ammunition is a popular choice among gun enthusiasts, notably for its effectiveness at medium-range targets, affordability, and widespread availability.
This upper typically includes the barrel, sights, and other components necessary for operation. It is interchangeable with the standard AR-15 lower receiver, allowing users to shoot 7.62x39mm ammunition from their AR-15 rifles.
Types β
| π‘ Standard Barrel Uppers: These feature a 16-inch barrel and a carbine-length gas system, making them versatile for a wide range of applications. The 16-inch barrel strikes a balance between accuracy and manoeuvrability, allowing for precise shots while maintaining ease of handling. | π‘ Long Barrel Uppers: These uppers are equipped with barrels longer than 16 inches, making them ideal for long-range shooting. The extended barrel length contributes to enhanced accuracy, allowing shooters to engage targets at greater distances with precision and confidence. | π‘ Free Float Handguard Uppers: These uppers feature a handguard that does not make contact with the barrel, offering several advantages. Eliminating barrel contact reduces interference and potential accuracy disruptions. This design enhances overall accuracy potential and allows for the attachment of accessories without compromising the firearm’s performance. |
| π‘ Short Barrel Uppers: With a barrel length of less than 16 inches, these uppers are specifically designed for close-quarters combat scenarios. Their compact size enhances manoeuvrability in tight spaces, providing a tactical advantage in confined environments. | π‘ Pistol-Length Gas System Uppers: Designed for use with short barrels, these uppers ensure reliable cycling of the action. The pistol-length gas system optimizes the performance of the firearm, providing smooth and consistent operation even in compact configurations. | π‘ Quad Rail Handguard Uppers: These uppers are equipped with a handguard featuring four Picatinny rails, offering ample space for attaching various accessories. The quad rail design provides versatility and customization options, allowing users to personalize their firearm setup according to their specific needs and preferences. |
Features π―
π The features are manifold, each enhancing the overall performance and adaptability of the firearm. One of the standout features of this type of upper is its compatibility with the 7.62x39mm cartridge, a popular ammunition choice among firearm enthusiasts due to its effectiveness at medium-range targets, affordability, and widespread availability.
π When it comes to the specifics of the upper, the barrel’s length is a key feature that directly impacts the firearm’s function. Standard Barrel Uppers, with their 16-inch barrel and carbine-length gas system, provide a balance between precision and handling, making them versatile for various applications.
- On the other hand, the Short Barrel Uppers, with a barrel length of less than 16 inches, are tailored for close-quarters combat scenarios. The compact size of these uppers bolsters manoeuvrability in confined spaces, providing a tactical edge in such environments.
- In contrast, Long Barrel Uppers are equipped with barrels exceeding 16 inches in length, which enhances the firearm’s accuracy. This makes them suitable for long-range shooting, allowing users to engage targets at greater distances.
π To accommodate the 7.62x39mm cartridge, these uppers will typically have an enlarged ejection port to allow for reliable case ejection. They also use specific bolt carrier groups and magazines designed for the tapered 7.62x39mm cartridge. The barrel will have a bore diameter of .310″ to stabilize the larger 7.62mm bullet. Barrel lengths commonly range from 10.5 to 16 inches.
Cleaning π§Ό
Cleaning your upper is crucial for its longevity and optimal performance. Start by ensuring the firearm is unloaded before beginning the cleaning process.
β Remove the upper from the lower receiver of the gun. Once separated, focus on cleaning the bolt carrier group (BCG), which frequently comes into contact with grime and residue. Use a quality gun cleaner to wipe off the bolt carrier, bolt, and firing pin. A brush may be useful in removing stubborn grime.
β Proceed to clean the barrel using a bore brush and rod, working from the breach to the muzzle to avoid damaging the firearm. Apply a firearm cleaning solution and scrub the inside of the barrel to remove any fouling. Following this, use a clean cloth to wipe out the residue.
β Next, focus on the upper receiver. Wipe down the interior, paying particular attention to the chamber and feed ramps. A chamber brush will be useful in this process to remove any fouling or brass particles. Use a clean dry cloth to remove any residual cleaner.
β Finally, reassemble your firearm. Apply lubricant to the necessary parts, ensuring a thin, even layer is spread across all moving components. Regular cleaning and proper maintenance of the upper is integral to maintaining its efficiency and reliability.
Best 7.62 x39 Upper Reviews
1# Radical Firearms AR-15 Complete Upper Receiver 7.62x39mm HBAR
The Radical Firearms AR-15 Complete Upper Receiver is the perfect choice for those looking for a high-quality, feature-rich upper receiver at an affordable price. This flat-top receiver is made from aircraft-grade aluminium and is mil-spec compliant, making it perfect for use with any Mil-Spec AR-15 lower receiver. It comes complete with an upper receiver, forward assist, ejection port door, RF barrel nut, HBAR barrel, and A2 flash hider. The free-float handguard provides ample room for accessories and can add Magpul Moe attachments and rail sections. With its superior craftsmanship and durability, the Radical Firearms AR-15 Complete Upper Receiver is the perfect addition to any AR-15.
2# Radical Firearms AR-15 RF Upper Assembly 16in 7.62x39mm
If you’re searching for a top-quality, MIL-STD upper assembly that’s perfect for novice or experienced shooters, then note the Radical Firearms AR-15 RF Upper Assembly 16in 7.62x39mm. This upper assembly comes with the rail system installed for increased accuracy and to keep your hands cool during extended shooting sessions. Plus, it’s compatible with any MIL-STD lower receiver. Simply add your BCG, and charging handle, and you’re ready to go!
3# Radical Firearms Complete Upper Assembly 10.5 inch 7.62x39mm
The Radical Firearms 10.5″ Hbar profile 7.62×39 is the outstanding choice for anyone wishing for a complete MIL-STD upper ready to drop on any MIL-STD Lower Receiver. Whether you’re a novice or an advanced shooter, this upper assembly is perfect for your next build. It features the 9″ MHR free float rail system for increased accuracy and keeping your hands cool. No matter what your style of shooting is, Radical Firearms has you covered.
4# CMMG Mk4 Resolute 7.62×39 Upper Receiver Group
Do you require a top-quality upper receiver group to complete your AR15 build? Check out the CMMG Mk4 Resolute Upper Receiver Group. This upper group is precision machined from billet 6061 T6 aluminium and features a black armour coating. It’s specifically designed to be paired with an AR15 lower group and comes with a CMMG Zeroed muzzle brake for added performance. Don’t settle for less than the best – go with the CMMG Mk4 Resolute Upper Receiver Group.
5# Maxim Defense Industries MDX 505 URG Upper Receiver
The CMMG Mk4 Resolute 7.62×39 Upper Receiver Group is an excellent choice when concealment and personal defence are non-negotiable. With a 14″ overall length and 5.5″ barrel, this upper receiver group is designed for close-quarter encounters and provides maximum energy on target without sacrificing accuracy at distance. The PDXU.R.G. is also equipped with the newly invented Maxim HatebrakeMuzzle Booster which significantly reduces recoil, decreases the flash signature, and pushes gasses and concussion waves downrange away from the operator – improving overall execution in short barrel pistols and rifles.
6# Ghost Firearms Elite Upper Receiver
Ghost Firearms Elite 7.62 Upper Receiver is a reliable upper receiver. This is fabricated with some of the most heavy-duty and dependable materials available, ensuring that it will last you for many years to come. Ghost Firearms has been producing high-quality products for a long time, and the Elite 7.62 Upper Receiver is their way of showing just how much they care about their customers. With its Carbine Length gas system and 1-10 barrel twist rate, this upper receiver is ideal for anyone seeking a great addition to their AR15. Plus, it comes with an A2 Flash Hider and M-LOK gun rail for added convenience and versatility.
7# CBC Industries AR-15 16 inch 7.62x39mm Complete Upper Receiver
Want to purchase a top-quality AR-15 upper receiver that can handle anything you throw at it? Take a look at the CBC Industries AR-15 16-inch 7.62x39mm Complete Upper Receiver. This is built to last with a forged CNC Machined 7075-T6 Aluminum upper receiver and a 4150 Chrome Moly steel barrel with a 1:10 twist rate. It also comes with a detachable 15 CBC Gen ll Keymod rail for endless attachment options. Plus, the large rubber butt-pad is removable for your convenience. It even comes with a 6-position Buttstock Locking clip to ensure placement. So don’t wait any longer, pick up the CBC Industries AR-15 16-inch 7.62x39mm Complete Upper Receiver today!
8# TRYBE Defense 16 inch 7.62x39mm AR-15 Complete Upper Receiver
The TRYBE Defense AR-15 16″ Upper Receiver is the perfect choice for anyone looking to build a high-quality AR rifle. Featuring a durable 4140 CMV steel barrel with 5R rifling and a 1:10″ twist, a 15″ M-LOK free float rail, an A2 flash hider, and a mil-spec charging handle, this upper receiver has everything you need to take your AR to the next level. Don’t settle for less than the best – pick up the TRYBE Defense AR-15 16″ Upper Receiver and enjoy shooting your AR with confidence.
9# Jacob Grey Firearms 7.62x39mm Complete Upper Assembly
If you are looking for a versatile and reliable upper assembly for your AR-15, then you need to check out the Jacob Grey Firearms 7.62x39mm Complete Upper Assembly. This upper assembly is designed to work with the 7.62x39mm round, which is becoming increasingly popular among shooters. The JG-47 Upper receiver features a reinforced extractor on the BCG bolt, making it more reliable and durable than other upper assemblies on the market. Additionally, the Jacob Grey Firearms 7.62x39mm Complete Upper Assembly comes with a standard A2 front sight base, making it easy to install and use.
10# Jacob Grey Firearms Ultralight 7.62x39mm Complete Upper Assembly
Jacob Grey Ultralight Complete Upper Assembly is a sleek, lightweight, and custom AR-15 complete upper assembly. This top-of-the-line AR-15 upper is designed with the next generation of shooters in mind, with features like a 7075-T6 billet receiver that is machined and cut to reduce weight and wear. The free float 7-sided M-LOK handguard leaves plenty of room for customization and accessory add-ons, while the 4150 chrome-moly steel barrel is chambered in 7.62x39mm with a 1:10 twist rate. Don’t sacrifice style or function with your AR-15 – get the best of both worlds with the Jacob Grey Ultralight Complete Upper Assembly.
Popular Troubleshoots π
There are a few potential issues that can arise when using an upper on an AR-15-style rifle. Here are some common problems and possible solutions:
| π£ Feeding Issues: | The tapered, rimmed 7.62x39mm cartridges can have feeding problems in AR platforms originally designed for straight-walled 5.56mm rounds. This can result in jamming, misfeeds, and failure to extract. Using an enhanced bolt carrier group and magazines specifically designed for 7.62x39mm can improve reliability. The magazine and upper receiver may also need minor fitting for optimum performance. |
| π£ Extraction Issues: | The shape of 7.62x39mm cases can cause extra friction during extraction. This is exacerbated by the location of the AR-15 ejection port. An oversized ejection port, possibly with additional tuning, is often needed to ensure smooth extraction and ejection of spent 7.62x39mm brass. |
| π£ Broken Extractors: | Standard AR-15 extractors are often not robust enough for continual 7.62x39mm use. Replacing them with heavy-duty 7.62x39mm-specific extractors reduces the chance of breakage. O-ring reinforced extractors can also help. |
| π£ Gas System Issues: | Since 7.62x39mm operates at lower pressures than 5.56mm, it may not reliably cycle some AR actions without adjustments. An adjustable gas block, heavier buffer, or lighter action spring may be required to ensure proper functioning. |
| π£ Magazine Wobble: | The loose fit of 7.62x39mm in standard AR-15 magazines can allow the rounds to move and wobble excessively while firing. Aftermarket magazines with proper dimensioning for 7.62x39mm help feed the round more smoothly. |
FAQ β
Conclusion π€©
The 7.62 X39 Upper is a versatile and adaptable firearm component that offers users a range of options to match their specific needs and preferences. Its compatibility with the popular 7.62x39mm cartridge, combined with the various configurations available, makes it a preferred choice among firearm enthusiasts.
Configurations range from standard and short barrel uppers for balance and close-quarter tactical advantages, to long barrel uppers for precision at greater distances, the upper caters to all shooting requirements. Enhanced with features like the free float and quad rail handguards for improved accuracy and customization, the upper stands out in its class.
However, like any firearm component, it necessitates regular cleaning and maintenance for optimal performance and longevity.
Affiliate Disclosure: Rotorm.com sometimes gets paid for listings, through sponsors or affiliate programs like Amazon, Optics Planet, Lucky Gunner, Brownells, Cabelas, Rainier Arms, 5.11 Tactical, Bass Pro Shop, etΡ. Clicking a link helps keep Rotorm.com free, at no extra cost to you!
About the author: Each article on our site is written by experts in survival and tactical equipment, gun enthusiasts, extreme travelers, military, law enforcement and desperate professionals, read about the author at the bottom of the article or visit "About Us" page.
Note: The views and opinions expressed in this article are those of the authors and do not necessarily reflect the official policy or position of any agency.
I have a 7.62 upper. I bought it 5 years ago. It is accurate, and extremely reliable too. Never any problems.
The post is great! I just ordered one upper from your list and the magazine. I will get the firing pin later. I just started with the AR platform
Greetings to everyone! What type of optics are recommended for a 7.62×39 upper?
The choice of optics for a 7.62×39 upper, just like with any AR-15 platform, depends on your intended use and personal preferences. Here are some considerations and recommended optics for different purposes:
π· Red Dot Sights: Red dot sights are a popular choice for 7.62×39 uppers, especially for close to intermediate range shooting. They offer rapid target acquisition and are parallax-free, making them excellent for fast-paced shooting scenarios, such as home defense or 3-gun competitions.
π· Holographic Sights: Holographic sights are similar to red dot sights but provide a different reticle display. They offer a clear, consistent aiming point and are known for their durability. They are suitable for both close-quarters and mid-range shooting.
π· Variable Magnification Scopes: For those who want to shoot at longer distances, a variable magnification scope (e.g., 3-9x, 4-12x) provides the ability to zoom in on distant targets. This is particularly useful for precision shooting or hunting where accuracy at extended ranges is crucial.
π· Night Vision or Thermal Optics: If you plan to use your 7.62×39 upper for nighttime shooting or in low-light conditions, consider night vision or thermal optics. These specialized optics allow you to see and engage targets in complete darkness.
π· Backup Iron Sights (BUIS): Regardless of your primary optic choice, it’s a good idea to have a set of flip-up or co-witnessed iron sights as backup. They can be invaluable in case your primary optic fails or if you need to engage targets at very close range.
I’m considering purchasing a complete AR upper assembly chambered in 7.62x39mm and would greatly appreciate recommendations on reputable brands to explore. Additionally, I’m looking for guidance on which brand of 7.62x39mm AR magazines to invest in for reliable performance.
I’m also curious about the compatibility of steel-case ammunition with a direct-impingement (DI) AR system. Any insights or suggestions regarding whether steel-case ammo will function reliably in this setup would be greatly appreciated.
Thank you in advance for any valuable suggestions or comments you can provide.
I’ve noticed that 7.62×39 ARs often encounter a range of problems, including issues with magazines and ammunition compatibility. However, I’ve found that PWS consistently delivers reliable performance in this caliber, and they are one of the few manufacturers I trust for 7.62×39 AR platforms.
Additionally, there are a handful of boutique manufacturers like Maxim Defense that produce high-quality 7.62x39mm ARs. These manufacturers prioritize precision and reliability, offering enthusiasts reliable options in this caliber.
I own several AR pattern 7.62×39 guns, including PSA and PWS models. I’ve experimented with various setups, and it’s been a lot of fun. I’m inclined to agree that PWS is the most logical choice, mainly because it replicates the piston concept of the rifle the caliber was originally designed for (the AK). However, I’ve found that the potential weak points are often the lower receiver and the magazines it’s paired with.
Good day! Can I use a suppressor with a 7.62×39 upper?
β Yes, you can typically use a suppressor (also known as a silencer) with a 7.62×39 upper, just as you would with other AR-15 upper assemblies.
βοΈ To use a suppressor, your 7.62×39 upper must have a threaded barrel. Most suppressors attach to the muzzle of the firearm via threads, so you’ll need the appropriate threading on your barrel to accommodate the suppressor.
βοΈ Ensure that the suppressor you intend to use is rated for the 7.62×39 caliber. Different suppressors are designed for specific calibers, and using the wrong one can lead to safety issues and reduced effectiveness.