Thats hard to say without know what trigger it is. Its possible that the first stage can be adjustable for pull weight or travel, and some can be adjusted so theres no first stage at all. 2 stage adjustables can be adjusted for 1st and/or 2nd stage travel, or pull weight, or both. Really good triggers can have up to 5 or 6 different adjustment options such as lateral alignment, trigger blade alignment, fore-and-aft blade positioning, etc.