Originally Posted by fxstdavew
You said you bought this from a policeman. It is possible this has a New York trigger in it which makes for a heavier trigger pull.There are a lot of options to lighten the trigger.
Good call, fxstdavew; I hadn't thought of this, but it is quite possible.
Did you get the Glock case with the pistol? If so, is the sticker on the handle still in place and readable? If you can read it, it should say something like "5.5 lb" which is the trigger spring that is installed. If it has a larger number, then it may have had a heavier trigger spring installed at the factory. Even if the case says 5.5 lb, the previous owner may have had a heavier spring installed at a later date.