MK-85 .54 cal

Anyone have any experience with the Knight 54s? There's one available at a LGS. Overall it's in decent condition (SS/lam stock) but I believe someone messed with the trigger. It's crisp and light (didn't have a gauge) but there's better than 1/4" of loose trigger travel before engages. I assume the Knight triggers lend themselves to being tuned up and some one was a little overzealous. I am new to the Knight world - are replacement triggers available? Thanks. DJB