Sports South is showing some new model numbers for more Mark IV's. # 40159 is a 5.5" with fixed sights, #40160 is a 6 7/8" with adjustable sights, and 43909 is a 4.4" in BRZ. #8645 is a compact .45 American. Since there is already a 5.5" target, hopefully the 40159 will be a fixed sight tapered barrel model. Maybe by spring, we'll know. We can add #43906 which is a 4.4" 22/45 version. Bob!!