Q Sugar Weasel Upper, .300BLK, ACC-SW-300-13IN-UPPER. We're finally offering individual upper receiver assemblies. Designed as a replacement upper for your standard Sugar Weasel or for whatever Frankenstein build you can think of. Specifications for Q Sugar Weasel Upper: Manufacturer: Q Barrel Length: 13 in Color: Cerakote Magazine Included: No Package Contents: Q Sugar Weasel Upper Q ACC-SW-300-13IN-UPPER: Sugar Weasel Upper .300BLK