The free float M-LOK handguard from Stern Defense delivers exceptional ergonomics, combining strength with a lightweight design for superior performance. Engineered to be M-LOK compatible, it provides a secure platform for your favorite attachments, enhancing both functionality and customization. Featuring a reliable clamp-on mounting system, this handguard stays firmly in place even under extreme conditions, including sustained full-auto fire and prone shooting with a bipod. Constructed from 6061 aircraft-grade aluminum and finished with a hard-coat anodization, it offers long-lasting durability and resilience. Additional quick disconnect swivel holes provide enhanced versatility for sling attachments. Stern 9mm barrels are designed for firearm enthusiasts looking to build a dedicated 9mm AR-15 upper group, offering a performance advantage over standard barrels. Every Stern Defense barrel throat is precision-machined with a deeper free bore to accommodate bullets with a longer ogive. This innovative design prevents common defensive rounds from jamming into the rifling before full chambering, eliminating potential malfunctions that could leave a round stuck and requiring manual clearing. The Mil-Spec flat top upper receiver is crafted for durability and reliability, featuring a Stern Defense laser-engraved dust cover and forward assist. Precision-machined from 7075-T6 aluminum and hard-coat anodized, it is further enhanced with a Mil-Spec dry film lube in the bore for smooth operation. The Mil-Spec AR-15 charging handle, laser-engraved with the Stern Defense logo, features an ergonomic latch for a positive grip, ensuring effortless one-handed manipulations even in high-pressure situations. The Stern Defense bolt assembly, built from 8620 AISI steel with a Mag-Phosphate finish, is fully compatible with Mil-Spec and Glock-pattern upper receivers. Engineered to function with both Colt SMG and Glock magazines, this bolt works seamlessly with standard AR-15/M16 charging handles. It arrives fully assembled with all sub-components, including a firing pin, spring, retaining pin, extractor, extractor spring and proprietary center and roll pins, ensuring smooth and consistent performance. Designed for peak efficiency, the compensator has been rigorously full-auto tested to minimize muzzle rise and maximize recoil control. Twin chamber ports ensure optimal gas utilization, delivering superior stability with every shot. Machined from U.S. Mil-Spec AISI 4140 steel and coated with black nitride, this compensator is built to withstand a lifetime of heavy use. Stern Defense components represent the pinnacle of American craftsmanship, providing shooters with a rugged, high-performance system built to endure the harshest conditions.

Hard coat anodized 6061 aircraft-grade aluminum handguard offers exceptional durability and corrosion-resistance
The sturdy handguard is built to withstand tough conditions while maintaining lightweight functionality
A lightweight handguard offers durability while maintaining maneuverability
A 15 inches handguard provides extended coverage for stability and accessory mounting
The smallest inside diameter of the handguard measures 1.435 inches, ensuring a precise fit
Barrel length is measured in overall length from breech to muzzle, ensuring compliance with legal and performance standards
The 16.1 inches barrel balances maneuverability and velocity, making it suitable for a variety of shooting applications
The barrel is threaded at 1/2-36 for compatibility with a variety of muzzle accessories
A 1:10 twist rate stabilizes a wide range of bullet weights, optimizing accuracy and ballistic performance
The Melonite coating offers superior durability and corrosion-resistance, significantly enhancing the longevity and performance of the barrel by providing a hard, protective surface
The sturdy construction is achieved with hard coat anodized 7075-T6 aluminum for a highly durable receiver
A laser-engraved charging handle enhances grip and durability
The sturdy construction utilizes hard coat anodized 6061 aircraft-grade aluminum for a robust and durable charging handle
Manufactured using 8620 AISI steel for a strong and resilient bolt
The custom 4140 billet extractor ensures superior ejection performance
Glock cut ensures compatibility with Glock-style slides
The mag-phosphate coating on the bolt provides superior corrosion-resistance, ensuring long lasting durability and performance, even in harsh environments
A 15.50 oz bolt delivers durability and smooth cycling for consistent and reliable function
Tested for full-auto performance to ensure durability under extreme conditions
The sturdy construction features a black nitride-coating on a US Mil-Spec AISI 4140 steel blast can for long lasting durability
Manufactured in the USA with precision and care for superior reliability

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It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.