Fallout 4 leaked concept?

Is this perhaps a new concept from the possibly upcoming Fallout 4? As we all know, the 10 mm pistol is one of the most well known weapons in Fallout 3 and can be picked up at around the start of the game. For me, its not so hard to believe that Bethesda Softworks would release concept art for one of their most well known weapons. Fans have been begging for in-game and production material for ages, so maybe we got lucky?

What do you think? I'm sure there are allot of sources where this may have come from, it is Google after all.

Original Fallout 3 handgun:

10 mm pistol (Fallout 3)

Fallout 3-10mm handgun

New, leaked concept:

10 mm (prod complete)

Fallout 4-10 mm pistol