The Super Duty MOD1 is the current evolution of the Super Duty platform, incorporating continuous design development to provide superior ergonomics and modularity while maintaining the legendary balance of performance and reliability. The Super Duty MOD1 300BLK upholds this legacy, featuring the latest in firearms technology available exclusively from Geissele Automatics. FeaturesSuper Duty Receiver SetReliability Enhanced Bolt Carrier GroupCHF Chrome Lined, 1:7" Twist BarrelHUXWRX QD 762 Flash HiderSSA-E X with Lightning Bow TriggerGeissele Ultra Duty Lower Parts KitSuper 42 Buffer Spring with H1 Buffer Weight