Originally Posted by
nate89
Long story short, I would toss a coin and be happy with either one. Mark and L&M has been doing milling on Sigs for quite some time, and you are going to get a great product. ATEi is also known for milling very tight pockets that can help extend the life of your red dot. L&M offers a 20 dollar cerecoat on just the milled area which is really nice. Sorry I'm not interested in paying just as much as the milling to recoat a pistol that only needs a small surface covered. I sent mine both in within a couple of days and they both came back around the same time, so wait times are comparable. Another advantage of L&M was the option to get new suppressor height sights installed there. ATEi said they would install sights I sent, but didn't have any sig sights on hand.
For the easier "all-in-one" stop with the recoating and new sights, I would hit up L&M personally.