I enjoyed the tension in the scene. I understand the point you are trying to make with "All American truck." I think just using the brand name would say that, i.e."Ford" Since the other vehicle in the driveway is a Lincoln(family has brand loyalty).

I think a double barrel shotgun is a bit over the top. If Lonan is living with his parents he may be too young to own a handgun himself. But maybe he could have one that was "gifted" to him by his Dad or Grandfather. "He reached beneath the trucks seat. His hand grabbing Grandpa's/Dad's old Colt 45."

cheers
Brett