The S1 dial is engraved in ¼-MOA increments and the S5 in 0.1 MIL. Both come with a locking zero stop and can be equipped with the Custom Dial System (CDS) through the Leupold Custom Shop.
As the dials are completely user-changeable, customer need not send in the riflescope. All that needs to be done is to remove the cap on the adjustment dial, and simply screw the S1 or S5 on in its place. It automatically aligns with the adjustment slot and securely tightens down, and completely eliminates backlash. The dials are interchangeable between different riflescopes in the field. For those with bullet drop compensating reticles, the S1 and S5 are completely compatible.
Made from 100 percent aluminum, the screw on dial is made in the USA in Leupold’s Oregon manufacturing facility. It is compatible with most Leupold riflescopes with click adjustments, with the exception of the VX-1 series and older riflescopes with friction adjustments.
For more, visit Leupold.com.