Shop › SHDW THREAD-ON COMP MR/R/XR BLK SHDW THREAD-ON COMP MR/R/XR BLK $99.99 Shadow Systems Thread On Compensator, Fits the Shadow Systems MR/DR/XR, 1/2x28, Black, Includes 2 Set Screws and Wrench SG9C-00-57 Quantity: Add To Cart Added! Shadow Systems Thread On Compensator, Fits the Shadow Systems MR/DR/XR, 1/2x28, Black, Includes 2 Set Screws and Wrench SG9C-00-57