The Only Church in Town - S2-E3
Other mistake: As Hannibal calls to B.A. in the truck, you can see some reflection of the lighting rigs and Hannibal's shadow, even though the sunlight is coming from in front of the truck.
When You Comin' Back, Range Rider? (1) - S2-E5
Other mistake: When the van is brought up out of the water, it's easy to tell it's not the real van. The wheels are different, and the side doors are double, rather than a single sliding door. Also, when Crane opens the door and looks inside, you can see the grille of the vehicle because the engine and shroud are missing.
Answer: They never use an M14. The nearly always use a Ruger Mini 14, a totally different weapon.
stiiggy