Sale RADICAL 6.8SPC 16" 15"RPR 15RD BLK The Radical Firearms 16" 6.8 SPC II AR rifle uses MIL-STD Upper and lower receivers along with their 15" RPR free float rail system for increased accuracy, keeping your hands cool, and giving you... MSRP: $704.95 Was: Now: $644.47 Out of stock