The Midwest Industries QD Optic Mount for the Trijicon ACOG-Mini TA33 and TA44 models is precision machined for optimum return to zero performance and reliability. Made of hard coat 6061 aluminum it is sure to last you a lifetime. Backed by Midwest Industries Lifetime Warranty. FeaturesSuperior clamping that will no damage or coin the rail surfaceExtremely smooth in operation with a multi-faceted adjustment nut to get the exact tension required by the operatorFully adjustable with no tools required, can be adjusted to fit rails not machined to mil-spec tolerances.Weighs only 2.1 oz.Precision machined for optimum return to zero performance and reliabilityHard coat anodized 6061 aluminum for a lifetime of servicePatented QD lever by Elite Defense Midwest Industries Lifetime Warranty