Spartan Precision Equipment Light Duty Optics Adapter Black. Specifications for Spartan Precision Equipment Light Duty Optics Adapter: Manufacturer: Spartan Precision Equipment Color: Black Weight: 0.2 oz Features of Spartan Precision Equipment Light Duty Optics Adapter CNC machined from 7075-T7351 aluminium billet with a hard-anodised black finish Package Contents: Spartan Precision Equipment Light Duty Optics Adapter Spartan Precision Equipment SP06-03-R: Light Duty Optics Adapter Black