The AR-308 platform, renowned for its versatility and power, has become a popular choice for gun enthusiasts, hunters, and tactical shooters alike. When it comes to building or customizing your AR-308 rifle, selecting the right upper receiver is crucial. One question that often arises is: What AR308 Uppers Work Woth DPMS?
In this guide, we will explore the compatibility between AR-308 uppers and DPMS lower receivers. Whether you’re a seasoned builder or a newcomer to the AR-308 platform, this article will provide you with the information you need to make an informed choice.
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Understanding AR-308 Compatibility
Before diving into which AR-308 uppers work with DPMS, it’s essential to understand the concept of receiver compatibility. In the What AR308 Uppers Work Woth DPMS to a specific design pattern for the lower receiver of the rifle. The DPMS pattern, often called the “Gen 1” pattern, is one of the most common designs for AR-308 rifles. However, there are different receiver specifications in the AR-308 platform, and not all uppers are compatible with all lowers.
The AR-308 upper and lower receivers must fit together, and while there are many manufacturers that produce AR-308 components, not all uppers are compatible with DPMS lowers. This is why it’s important to ensure that the upper you choose works with your DPMS lower receiver.
Key Features Of DPMS Lower Receivers
The DPMS AR-308 lower receiver was designed to be compatible with a variety of upper receivers. However, it is important to note that DPMS receivers are based on a proprietary design that differs slightly from other AR-308 variants, such as the Armalite AR-10 and the Knight’s Armament SR-25. Here are some of the primary features of a DPMS AR-308 lower:
Lower Receiver Dimensions: The DPMS lower is designed to work with a specific set of tolerances, ensuring proper fit with other components.
Buffer System: The DPMS system uses a standard AR-15-style buffer tube, although it is sized differently for the AR-308 platform. This must match the buffer in your upper receiver for smooth operation.
Bolt Carrier Group (BCG): DPMS lowers typically require a BCG designed specifically for the AR-308 pattern. This differs from the AR-15 BCG and is essential for reliability.
Handguard Attachment: The handguard attachment system can vary depending on the design of the upper receiver, so make sure that the handguard you choose is compatible with your upper receiver and lower receiver setup.
DPMS Gen 1 vs. Gen 2
DPMS has released multiple generations of their AR-308 lower receivers, and the Gen 2 variant has become increasingly popular. The Gen 2 receiver is slightly more compact, providing a better fit for certain uppers. When looking for an upper to pair with your DPMS lower, make sure you check whether it is designed for Gen 1 or Gen 2 compatibility. These two generations are not always interchangeable, and using an incompatible upper receiver may lead to fitment issues or operational problems.
Uppers Compatible With DPMS Lowers
DPMS Gen 1 Uppers
As you may expect, the most straightforward option is to use a DPMS Gen 1 upper with your DPMS Gen 1 lower receiver. These uppers are specifically designed to fit DPMS’s proprietary lower receiver, and their construction reflects the standard dimensions that the platform is known for. DPMS uppers come in a variety of configurations, from complete upper assemblies to parts kits for DIY builds.
DPMS Gen 2 Uppers
If you’re using a DPMS Gen 2 lower receiver, you’ll want to use an upper that’s designed for this generation. DPMS Gen 2 uppers have a slightly more compact design, which fits better with the Gen 2 lower’s more refined dimensions. These uppers are becoming increasingly popular for their ergonomic benefits and ease of use. A DPMS Gen 2 upper will provide a more seamless integration with your Gen 2 lower than a Gen 1 upper would.
Aftermarket AR-308 Uppers
Some companies manufacture uppers that are compatible with DPMS-patterned lower receivers. These include major brands such as:
Aero Precision: Aero Precision makes both DPMS-patterned uppers (Gen 1 and Gen 2) designed specifically to work with DPMS lowers.
Palmetto State Armory: Known for their budget-friendly AR-308 uppers, Palmetto State Armory offers uppers that work with DPMS-patterned lowers, providing great value for those looking to build a reliable AR-308.
Brownells: Brownells also offers a variety of uppers compatible with DPMS lowers, ensuring that you have a reliable platform for your custom build.
These aftermarket uppers are often designed with specific features, such as free-floating handguards, enhanced barrels, or M-LOK attachment points, allowing you to upgrade your AR-308 for better accuracy, ergonomics, and performance.
Other AR-308 Pattern Uppers (Armalite, SR-25)
It’s important to note that while DPMS-pattern uppers are popular, there are other AR-308 patterns, including the Armalite AR-10 and Knight’s Armament SR-25. These upper receivers do not directly fit with DPMS-patterned lower receivers, and using a non-DPMS upper with a DPMS lower will cause fitment and compatibility issues.
If you have a DPMS lower, it’s best to stick with DPMS-pattern uppers. While you might be able to use certain parts from other manufacturers, a mismatched combination could result in a less reliable firearm.
Choosing The Right Upper For Your DPMS Lower
When selecting an upper for your DPMS lower receiver, you’ll want to consider a few key factors:
Intended Use
What will you use your AR-308 for? Whether you’re building a hunting rifle, a tactical precision rifle, or a general-purpose firearm, the type of upper receiver you choose should reflect your specific needs. For example, a free-floating barrel and handguard system are great for precision shooting, while a more basic, mil-spec upper may suffice for general purposes.
Barrel Length
Barrel length is a critical factor in determining the performance of your rifle. Longer barrels are great for long-range shooting, while shorter barrels provide better maneuverability for close-quarters situations. When selecting an upper, consider the role your rifle will play and the performance you need from it.
Handguard System
Most modern AR-308 uppers use a free-floating handguard system. This is important for accuracy, as it helps ensure that your barrel is not subjected to torque from the handguard. Ensure that the handguard system on the upper you choose is compatible with your shooting style and ergonomic preferences.
Gas System Length
AR-308 uppers come with different gas system lengths, including carbine, mid-length, and rifle-length. Make sure the gas system of your upper matches your lower receiver’s setup. A mismatched gas system can lead to cycling issues, affecting the performance of your rifle.
Conclusion
The AR-308 platform is a great choice for those looking for a powerful, versatile, and customizable rifle. DPMS-patterned lower receivers are some of the most common and widely used in the AR-308 world. However, selecting the right upper receiver to pair with your DPMS lower is essential for achieving a reliable and functional firearm.
By choosing the correct DPMS-pattern upper, such as DPMS Gen 1 or Gen 2 models, or trusted aftermarket options, you can ensure that your rifle functions properly and meets your needs. Whether you’re upgrading your rifle for tactical use, long-range shooting, or hunting, the right upper will make all the difference.
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FAQs
What is a DPMS-patterned AR-308 lower receiver?
What AR308 Uppers Work Woth DPMS lower receiver is a type of lower designed for use in the AR-308 platform, based on DPMS’s proprietary design. It is compatible with certain upper receivers that adhere to DPMS’s specifications. These lower receivers are popular for their reliability and are commonly used in custom builds.
Can I use an AR-10 upper with a DPMS lower?
No, an AR-10 upper typically does not fit with a DPMS lower. The AR-10 uses a different pattern that is not compatible with DPMS. To ensure proper fitment, it’s best to use a DPMS-patterned upper with a DPMS-patterned lower.
What’s the difference between DPMS Gen 1 and Gen 2 receivers?
The DPMS Gen 2 receiver is slightly more compact and refined compared to the Gen 1. The Gen 2 design provides improved ergonomics and a better fit for certain components. You must match a Gen 2 upper with a Gen 2 lower to ensure compatibility.
Which brands make uppers compatible with DPMS lowers?
Brands like Aero Precision, Palmetto State Armory, and Brownells make AR-308 uppers that are compatible with DPMS-patterned lowers. These brands offer a variety of options, including budget-friendly models and high-end precision uppers.
Can I build my own AR-308 rifle using a DPMS lower?
Yes, you can build your own AR-308 rifle using a DPMS-patterned lower. There are many aftermarket parts available, including uppers, barrels, handguards, and other components, that are compatible with DPMS lowers, allowing you to customize your build to suit your preferences.
