The AR-10 and DPMS 308 are both .308 caliber rifles based on the AR-15 platform, but significant differences exist that impact performance, compatibility, and overall suitability for various applications. This article delves into those key distinctions to help you choose the right rifle for your needs.
What is an AR-10?
The term "AR-10" broadly refers to any rifle chambered in .308 Winchester (7.62x51mm NATO) that utilizes a design inspired by Eugene Stoner's original AR-10 rifle. It's crucial to understand that "AR-10" isn't a brand name but rather a platform designation. Numerous manufacturers produce AR-10 style rifles, each with its own variations in design and features. This lack of standardization is a key point of difference from the AR-15 platform.
What is a DPMS 308?
DPMS (now part of Ruger) was a prominent manufacturer of AR-10 style rifles. Their DPMS 308 pattern became a popular and influential design within the AR-10 platform. While not the original AR-10 design, the DPMS 308 established certain design conventions that are now frequently imitated. This means many AR-10 rifles on the market share characteristics with the original DPMS 308 design, even if they're not made by DPMS.
Key Differences Between AR-10 and DPMS 308:
While many AR-10s share similarities with the DPMS 308, focusing on the distinctions highlights the nuances within the AR-10 platform itself:
1. Receiver Specifications:
- AR-10: The AR-10 platform lacks the standardization of the AR-15. Different manufacturers use varying receiver dimensions, making parts interchangeability a significant concern. You can't necessarily assume parts from one AR-10 manufacturer will fit another.
- DPMS 308: DPMS 308 rifles established a specific receiver dimension that many manufacturers adopted. While not universally compatible with all AR-10s, a higher degree of parts interchangeability exists within the DPMS pattern. This makes finding replacement parts and accessories often easier.
2. Bolt Carrier Group (BCG):
- AR-10: Again, due to lack of standardization, BCGs are generally not interchangeable between different AR-10 manufacturers.
- DPMS 308: DPMS pattern BCGs are more likely to be interchangeable within the DPMS pattern family of rifles.
3. Magazine Compatibility:
- AR-10: Magazines are generally manufacturer-specific. A magazine from one AR-10 maker may not function reliably in another.
- DPMS 308: DPMS pattern magazines are often compatible with other rifles using the same pattern, though slight variations may exist.
4. Overall Size and Weight:
- AR-10: Generally larger and heavier than AR-15s, due to the larger cartridge. Variations exist depending on manufacturer and specific model.
- DPMS 308: Similar size and weight to other AR-10s in its class, reflecting the design choices made in its development.
5. Parts Interchangeability:
- AR-10: Low across different manufacturers.
- DPMS 308: Higher within the DPMS pattern, though not guaranteed across all manufacturers using the pattern.
Choosing Between an AR-10 and DPMS 308 (or similar pattern):
The choice depends on your priorities:
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Prioritize Parts Interchangeability: If you want readily available parts and a wider selection of compatible accessories, a DPMS 308 pattern rifle is generally the safer bet.
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Specific Manufacturer Preference: If you have a preference for a particular AR-10 manufacturer known for quality or a specific feature set, that should guide your decision. However, be aware of limited parts interchangeability.
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Budget: Prices vary significantly across AR-10 manufacturers. Research thoroughly to find the best value for your needs.
Ultimately, understanding the nuances of the AR-10 platform and the historical significance of the DPMS 308 pattern is crucial for making an informed decision. Thorough research into specific models and manufacturer reputations is highly recommended before purchasing any AR-10 style rifle.
