Thinking of going to Jackson,NJ this upcoming weekend for the GSSF shoot. I have a older 19 and I am not sure if it would considered to be a stock gun or not and need some advice. I have not shot in a Glock match before and I would be looking to shoot in the amateur civilian category. The only items I have added to the 19 are the Pearce Grip Enhancers (PG-FML) to my preban glock mags, used to fill in the half moon cut out and have also have installed the Backstrap Channel Plug(JP1),both items puchased from Top Glock. I would like to know if this changes my Glock from stock so I would have to shoot is a diffrent category. Thanks for the help Rich G.