They don't come with 3.5 lb triggers. They come with 4.5 lb triggers, it takes a lot to get them to 3.5 lbs. They come with the +/- connect which is 4.5 lbs and stock springs. Putting in a 3.5 connector and wolf spring pack including the striker spring gets you to about 3.5 lbs, how ever unless you have a lightened striker you risk light primer hits. with the stock striker springs you back over 4 lbs. My 17's trigger was far better than my 34 trigger because of use, 10,000 rounds vs new. After the $0.25 trigger job, the WOlf spring pack and stock striker spring,and 3000 rounds, its moderately better than my 17's.