Maxim PDX Upper - 5.56 NATO - 5.5" - 1:5 - Pistol - Arid

Dominate Close Quarters with Unmatched Power and Precision

For those who demand the ultimate in personal defense and tactical performance, this 5.5-inch barreled upper receiver group from Maxim Defense is engineered to excel in the most intense close-quarter encounters. Designed for Tier 1 operators and serious enthusiasts, this compact solution is built to seamlessly integrate with any Mil-Spec lower receiver, delivering maximum energy on target without compromising accuracy at extended ranges. Whether you're navigating tight urban environments, executing rapid defensive maneuvers, or prioritizing concealment, this upper receiver group offers unparalleled reliability and performance where every second counts.

• Barrel Length: 5.5 inches, optimized for close-quarters combat and concealment.
• Overall Length: Just 14 inches, ensuring maximum maneuverability in confined spaces.
• HATEBRAKE™ Muzzle Booster: Patent-pending design reduces recoil, minimizes flash signature, and directs gasses and concussion waves downrange for improved operator control.
• Direct Impingement System: Provides reliable cycling and consistent performance under demanding conditions.
• Premium Materials: Constructed from military-grade 6Al-4V Titanium, 17-4 Stainless Steel, and 7075/6061 Aluminum for unmatched durability.
• HK Height Rail: Enhances upper receiver rigidity for superior stability and accessory mounting.
• M-Slot Compatible Handguard: Offers versatile customization options for tactical accessories.
• Mil-Spec BCG Included: Ships with a high-quality bolt carrier group for immediate use or compatibility with PDX/SCW systems.