big89The rear sht has a large aperture for fast target acquisition. It excels at close ranges (inside 75 yards) and in low-lht conditions. It mounts on top of the M89’s bolt. BillWLS THE B 89 OF 1974 . Courtesy of David Dana-Bashian 1. Seasons In The Sun -- Terry Jacks -- Bell 2. I Honestly Love You -- Olivia Newton-John --