The Gen-II Pro Series Rifle upper is an evolution of the M4 model, adding an 11.8" free float aluminium forend with 8 position Picatinny rail. All other characteristics remain unvaried: 18.5" heavy match, parkerized barrel, steel bolt, Mil-Spec components. Fully functional with select fire lowers.
- Type: Complete Gas Impingement
- Caliber: 22 Long Rifle
- Barrel Length: 18.5"
- Barrel Material: Steel
- Barrel Twist: 1:16
- Barrel Finish: Parkerized
- Receiver Description: A3 Polymer
- Receiver Finish: Black