Had a NIB and wanted to put a 3.5 in it and it would not reset. Would work once and only once. Put that 3.5 c in a different gun and it worked fine. Some triggerbars and con. do not work together. Does not happen often but it has happens before with different glocks I have installed them in for the shop. So I new how to fix it. I would not worry you will be fine.
WAS GONE BUT NOW I AM FOUND WAS PART OF THE RAZOR BACK PROGRAM SERIAL # 003 (STILL UNSHOT) BACK IN THE DAY. COULD NOT REMEMBER OLD EMAIL OR PASSWORD SO HERE I AM AS A NEWBIE