The SCT-4006 is designed for the Tikka T3X, but will also fit on the SAKO TRG 22/42, and features one classic ring and one interface ring, which can be rotated as to position the interface/accessory in either the 12-o'clock or 3-o'clock position. As with all our SAKO/Tikka mounts the SCT-series feature a recoil lug that can be moved for improved eye-relief.