SHREWD OPTUM SCOPE P-51 EDITION 40 MM RH The optum takes the versatility and features shrewd scopes are known for to the next level. With more adjustability than any other scope in their line; the optum packs all the features of the nomad platform into an efficient and easy to use package. The hassle of changing pin positions, installing a light kit, and swapping fiber is gone. The optum series are the epitome of adjustable efficiency.