I just picked up this one for my M&P 45:
THUMB BREAK SCABBARD
The fit and function are outstanding... still a bit 'snug' as it's not yet broken in. Very comfortable, really hugs my waist for a very low profile. The only gripe I have is that the inner surface of the leather is(was) very coarse, as I'd rather not wipe out the slide's finish. I sanded down the inner surface with some super light 1500 grit and some elbow grease and it's now smooth as glass. Adjustable retention, very slick
