Radian Weapons AX556 Features This kit comes fully equipped with a billet upper receiver featuring a dust cover anti-rotation pin and a lightweight forward assist for maximum durability and reduced weight. The AX556 lower receiver provides an ambidextrous design for enhanced functionality including ambidextrous bolt catch/release and magazine release. Additionally the 15.5 M-LOK handguard ensures modularity for mounting accessories. The inclusion of a Raptor-SD Ambidextrous Charging Handle and Talon 45/90 Safety Selector further enhances usability. Each component from the enhanced takedown pins to the barrel nut wrench is meticulously crafted for seamless assembly and operation. Radian Weapons AX556 Specifications Caliber: 556 NATO / 223 Remington Material: Billet Aluminum Finish: Cerakote Brown Receiver Type: Upper and Lower Set Handguard: 15.5 M-LOK Safety: Radian Talon 45/90 Ambidextrous Safety Selector Bolt Catch/Release: Ambidextrous Magazine Release: Ambidextrous Includes: Billet Upper Receiver w/ Dust Cover & Forward Assist AX556 Lower Receiver Raptor-SD Ambidextrous Charging Handle M-LOK Handguard Barrel Nut & Wrench Enhanced Takedown Pin Set