Carry my FNP 45 in a Blackhawk Sportster Serpa that was actually made for a full sized Springfield XD. Can't remember the actual model number but the package was plainly marked for the XD.
It was initially a fairly tight fit. I soaked it down in gun oil and laid it out in the sun for about 3 hours with the gun in it then brought it back inside and let it cool back to room temp. Then wiped up the excess oil. It now fits like a glove.
Bought it at Academy Sports and they were nice enough to let me open several of the clamshell packs and try the pistol in each until I found a fit. The opened packs were easily reclosed.