Make sure that all the things while in the trigger mechanism settles set up prior to putting in the mount - reinstall the slide and try the trigger. When I did it for The very first time, my three. The BlackPoint Outback™ Upper body System's sleek structure and light-weight https://fn510accessories94825.shivawiki.com/7274413/the_single_best_strategy_to_use_for_fn510_accessories