Daniel Defense LPK. There are enough negative threads mixed in with the positives on Springfield triggers that I would avoid it. I don't like the idea of having a human hone away at individual trigger groups, each slightly different from the next versus a consistent factory product. I'd always pick the factory product. For a similar price, you can get an ALG Defense trigger. They're an entry-level "match" or "improved" trigger over factory. It's a company run by Bill Geissele's wife, and Geissele sets a gold standard in battle-tested match triggers.