M2A3s come in two basic types.
1st Type: Rebuilt to new-standard or updated older vehicles will usually have the flat front mud guards and can have either the newer one-piece or older two-piece front glacis plate with a vertical joint down the middle. Robin_Nilsons’ pic above looks to be one of these vehicles.
2nd Type: New-build vehicles come with the rounded mudguards as in the Meng kit. They also almost always have the newer, one-piece lower front glacis plate.
More info on Bradley evolution here: