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The William Optics Riser Blocks are available for various models. Riser Blocks come as a set of 2 and add about 15mm of spacing between the scope rings and dovetail bar.
- BK132: FLT132 / FLT91 / FLT120
- BK100: RedCat71 WIFD / GT81 WIFD / GT102 / Z103 / Pleiades111
- BK81: GT81
- BK71: GT71 / Z73
- BK61: RedCat61