Angus from Deathcore Airsoft reviews the tightbore inner barrel from Raptors Airsoft called Cyclops... "Today we have the quick and basic overview of the Raptors Airsoft Cyclops TightBore Barrel for your airsoft AEG. Obviously this is available in all different lengths, and it is constructed of a solid steel. The barrel does improve the groupings quite well, as you can see during the performance test."