“FN SCAR HEAVY NRCH CONVERSION – FOR SCAR HEAVY 17S/20S” has been added to your cart. View cart HomeOther Gun Accessories & PartsRADICAL UPPR 300BLK 10.5″ MLOK BLKRADICAL UPPR 300BLK 10.5″ MLOK BLK$307.00 RADICAL UPPR 300BLK 10.5″ MLOK BLK Additional information UPC 816903024094 Manufacturer Radical Firearms Manufacturer Part Number CFU10.5-300HBAR-10RPR Barrel Length 10.5" Caliber/Gauge .300 AAC Blackout Product Type Upper Out of stock