I just got my MDT XRS chassis for my Cz 457. I’m running a pretty tall bipod up front, an Accutac SR5-G2. I would like to get a protektor rear bag. I’m just not sure which size I should get. The 13B with bunny or rabbit ears? I’m also looking at getting the Little Crow Gunworks bag rider for the XRS. If I get the bag rider, should I be looking for a rear bag that has a 1/2 inch gap between the ears? On another note, my L3i barrel should be arriving in a few weeks. What barrel shim have you guys been using?









