16" 300 AAC BLACKOUT Upper Specifications: - Carbine Length Handguard - F-Marked Front Sight Base - Carbine Length Gas System - Flat-top A3 Upper Receiver - Compatible with standard AR15 lowers - 16" Barrel - 1:8 Twist - 5/8x24 Threaded A2 Style Flash Hider - Chambered in 300 AAC Blackout - Bolt Group: M16 Bolt Group
