I bought this to improve the trigger action on a Springfield XD-40 Service Model. The install was easy enough and the new trigger action is certainly very short with little take up. Be aware that instructions and labelling of components is non-existent so YouTube is your installation friend! The components with a daub of blue (striker and trigger spring) are the competition components and give the lightest pull (and possibly an underpowered striker spring).
I experienced two problems, firstly the trigger safety pre-installed in the trigger doesn't reset when the trigger resets, you need to manually push the safety lever back into its reset position. This doesn't prevent use of the gun but it means the trigger safety is not preventing the trigger from being depressed as intended. The second problem is serious and at time of writing remains unresolved. The very short trigger action is not sufficient to lower the seer block enough to release the striker, so the gun won't fire. I tried everything I can think of short of filing down the striker release block which I'm not willing to do for a drop in trigger kit. Its currently with a gunsmith to try and resolve (probably doubling the cost of this trigger!).
I will add that my XD-40 Service Model is one of the first generations of this model from the 2000's. My suspicion is the this trigger kit was designed to work with later generations only and not for the original generation. So, be cautious if you have an older gener...
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