Anyone know what this thing is?????

[tactical0215]

Gun is a 45 caliber, single action with a single stack magazine. The only marking is a serial number on the bottom of the magazine well. There are no markings on the slide at all. There is no obvious marking removal indicators such as grind marks. The slide and frame match and there do not appear to be add-ons. It looks like a stock weapon and we just cannot determine its lineage.

The weapon has some very distinguishing features such as the beaver tail, slide mounted safety and frame tactical slide mount. Any help would be greatly appreciated.

This is the only picture we have as the weapon is currently in evidence.