I did an inexpensive build.
During firing, the trigger does not reset every time (but it does reset most of the time). I have to pull the trigger again, then it resets.
I have approximately 150 rounds through it and I am thinking it has to do with the trigger spring.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)