Newby here, this is my first post but long time reader. just got cz 550 varmint 308 and Millett Tactical Rifle Scope TRS-1 4-16x50mm with burris xtreme rings. scope and rings were gifts. because cz has different bases, there is 1/8" gap between the bottom of the rings and the bases. therefore, i have two options: buy cz rings or install picatinny bases. the xtreme rings look rugged and would like to use them. any suggestions are welcome.