Elevate your DISSENT MK4 with our .22 ARC (Advanced Rifle Cartridge) upper group, whether you're starting anew or expanding your caliber options. Pair effortlessly with any Mil-Spec compatible lower receiver and utilize the included 1913 picatinny rear end plate to customize with accessories like slings for pistol builds or folding stocks for compact carbines. Engineered with our pioneering direct impingement Compact Action, DISSENT upper groups house the entire action and recoil assembly within the upper receiver, reducing overall bulk and length compared to traditional AR pistols. The forward non-reciprocating side charger ensures swift bolt operation without disrupting your aim, with left side chargers standard on direct impingement DISSENT models; right side charging handles are also available. Each DISSENT upper group features a 1913 picatinny rail end plate, replacing the need for a lower receiver buffer tube. Whether you seek suppressed shooting or precision tuning to your preferred ammo, the adjustable gas block offers precise control over the gas system, delivering optimal performance tailored precisely to your preferences. Experience the perfect balance , never too much, never too little , with DISSENT.