Explore new possibilities for your DISSENT MK4 with our .22 ARC (Advanced Rifle Cartridge) upper group. Whether you're starting a build from scratch or expanding your caliber options, this upper group seamlessly pairs with any Mil-Spec compatible lower receiver. Included is a 1913 picatinny rear end plate, allowing you to customize with accessories like slings for pistol configurations or folding stocks for compact carbines. Engineered with our patent-pending direct impingement Compact Action, DISSENT upper groups house the entire action and recoil assembly within the upper receiver. This design reduces bulk and length compared to traditional AR pistols, offering enhanced maneuverability and control. The forward non-reciprocating side charger ensures quick bolt operation without losing sight of your target, while direct impingement DISSENT models feature a standard left side charger with optional right side charging handles available. Each DISSENT upper group is equipped with a 1913 picatinny rail end plate, eliminating the need for a lower receiver buffer tube. Whether you're aiming for suppressed shooting or fine-tuning your DISSENT to your preferred ammunition, our adjustable gas block provides precise control over the gas system, ensuring optimal performance tailored to your preferences. Experience the perfect balance of functionality and customization with DISSENT, where you'll find just the right amount of everything you need for your next mission or range session.

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Shipping Restrictions

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.