Age this buck

First off, I don't have a shot of this guy's rack. My brother is a bit of a novice on setting up the trail cam and got this pic last week. I say he's a pig and at least 4.5. What say ye?

 

Barrel chest, wide looking stance, I'd have to go with a 4.5 too.

 

From that picture, I would say at least 4.5. The easiest thing for me to identify in the pic would be the distance from his back to belly, and belly to the ground (at the front leg) looks to be the same distance.