The world of AR-15 builds is vast and varied, and finding the right parts can feel overwhelming. One component that often sparks interest, and sometimes confusion, is the PSA (Palmetto State Armory) machine gun upper. This isn't your typical AR-15 upper receiver; let's clarify what it is, what it's not, and delve into its implications.
Understanding the "Machine Gun" Designation
Before diving into PSA's offerings, it's crucial to understand the term "machine gun" in this context. Importantly, PSA does not sell actual machine guns. The term "machine gun upper" is often used loosely in the AR-15 community to refer to uppers designed for full-auto functionality. However, these uppers are only functional in a full-auto capacity if paired with a legally registered and appropriately licensed machine gun lower receiver. Owning or attempting to assemble a machine gun without the proper legal permits and registration is a serious federal offense.
PSA's Role: Manufacturing Components, Not Illegal Firearms
Palmetto State Armory primarily manufactures and sells AR-15 components, including uppers, lowers, barrels, and other accessories. Their "machine gun" uppers are designed to be compatible with fully automatic lower receivers. These uppers typically include features like a modified bolt carrier group and other internal components optimized for sustained automatic fire. They are sold as individual parts, not as complete, functional machine guns.
What You Need to Legally Possess a Full-Auto AR-15:
- A legally registered machine gun lower receiver: This is the serialized part of a machine gun that requires ATF registration and licensing. Acquiring these is subject to strict regulations, background checks, and significant costs.
- A compliant upper receiver: An upper designed for full-auto functionality, such as a PSA "machine gun" upper.
- Proper licensing and permits: All aspects of ownership, possession, and use must comply with federal and state laws. This includes potential tax stamps and other legal requirements.
Exploring PSA's Upper Receiver Options
While the focus is on the "machine gun" upper, PSA offers a wide range of AR-15 upper receivers for various applications. Understanding the differences is crucial:
1. Standard Semi-Automatic Uppers:
These are the most common type, designed for semi-automatic operation only. These are readily available and legal to purchase for civilian use.
2. "Machine Gun" Uppers (for registered machine guns only):
These uppers are specifically designed for full-auto operation, but legally function as such only when paired with a registered machine gun lower.
Key Differences Between the Two:
- Bolt Carrier Group: Full-auto uppers often feature a heavier bolt carrier group and modifications for reliable cycling during sustained automatic fire.
- Internal Components: Other internal parts, like the firing pin and other components, may be reinforced or modified for durability and reliable operation under full-auto stress.
Legal Considerations: A Critical Reminder
It's paramount to emphasize the legal restrictions surrounding the ownership and use of machine guns in the United States. Always adhere to all applicable federal, state, and local laws and regulations. Ignorance of the law is not a defense. If you are interested in owning a full-auto firearm, thoroughly research the legal requirements and obtain all necessary permits and licenses before attempting to assemble or possess one.
Conclusion: Responsible Gun Ownership
The availability of parts like PSA's "machine gun" uppers highlights the complexity of the AR-15 market. Understanding the legal ramifications of each component is crucial for responsible gun ownership. Always prioritize safety and legal compliance when building or modifying firearms. This article serves as informative material only and should not be considered legal advice. Consult with relevant authorities and legal professionals for definitive guidance on firearm ownership and regulations.
