u/Additional-Duck9973

I can’t seem to find a size that’s close to the length of rod that my 556 mini jack needs the closest I can get is AGP-A-23 that measures 4.19 while I am getting 4.147. The paperwork says it can only be +/- .03 and right now I have +.043. The hole distance I is correct. And when I google which piston my gun should use it says that I need the AGP-A-4. So I’m just hoping someone has put one in there mini jack and could lmk which would be the right one.