Anyone know if there is a Walther PPS bore site?

The only manufacturer that I know of that makes lasers that replace your guide rod is Lasermax. I don't believe they make one for the PPS. They have quite a limited selection, actually.

While all of my esteemed colleagues gave very good answers about the nice old Walther PPK/S that Bond, etc. used to use, I believe you are referring to the brand spankin' NEW Walther PPS, which is an INCREDIBLY thin (1.04") concealable 9mm gun with a .40 cal on the way. I have only examined and dry-fired one at a buddy's shop- just got a few in, and it was nice, but pricey at about $630. It does feel good in the hand and points well. Didn't like the trigger feel all that much and it has a decidedly Glock-like trigger safety, but it seems to be a very nice little gun. It IS very small and thin and totally concealable, and you have your choice of magazine sizes 6, 7, or 8 rounds. The six is too short for normal sized hands (like Glock 26,27,30) but it makes the gun dissappear in your pocket or wherever you choose to holster it. Uses the very reliable Browning-style tilt-barrel locking mechanism, and seems to be a well-designed, tight little gun that should shoot well for a short barrel (3.2") defensive or back-up gun. Walther is known for reliability and decent precision (not counting their mishaps with S&W) so it should be a great CCW permit holder gun or B/U weapon for Law Enforcement, which it is designed for in Germany. I would certainly buy it before I ever wasted any money on the other small concealables made by junk dealers like Kahr, Kel-tec, etc. $600+ is a lot for a gun like this, but Walther fans and those looking for a reliable ultra-concealble gun will probably love it. If you need a gun like this and have the $$$, seems like a good investment