Originally Posted by CreepyLady
The firing pin on the topper is not making contact with the firing pin on the MVP.
First clean with alcohol on a qtip.
If that doesnt work, pry down the pin on the topper just a TEENY tiny bit.
If you are still getting a non reading after each of the above - CAREFULLY pry up the firing pin in the well on the MVP2 - just a TEENSY LITTLE BIT.
If all of the above fails - maybe