A Mezzuzah is clearly visible on a door frame of the Mt. Carmel compound. It is incorrectly configured, having its upper portion pointing outdoors. Properly installed, a Mezzuzah's top points toward the interior of the dwelling.
The armored vehicles shown are not just old, but are not the proper types of vehicles actually deployed. No tanks were used in the final actions, and none had weapons installed/activated. Instead they were CEVs, Combat Engineering Vehicles, or basically bulldozers on tank platforms to provide armor protection.
Likely for reasons of safety, the fire that engulfs Mount Carmel is more clean and controlled than the real Waco fire.
A post-1998 Ford Crown Victoria/Mercury Marauder appears in one shot.
While the actress portraying Attorney General Janet Reno resembled her, her eyeglasses have plano (no power) lenses. Reno had severe hyperopia which were thick plus power as a magnifying glass.
At around 26'20, David says that the totaled '68 Chevrolet El Camino cannot be replaced or brought back to its former glory. While the wrecked car is indeed a Chevrolet El Camino/GMC Sprint, this particular model couldn't have been produced before 1971.