When Dom and Hawke are performing their stunt fight on the balcony, the long shots of the scene reveal stuntmen in their places.
When Karl is finished demonstrating the laser for the arms dealer, he unplugs a cable from the gun and its power supply. In all subsequent scenes where the laser is used, the cable is not seen.
Jan-Michael Vincent's stunt double is clearly recognizable in the escape from the barn and the ensuing motorcycle chase and fight on the truck.
While Larson is driving with the Mongoose in the back of the truck, you can clearly see that he is driving the truck on the right side, rather than the left. After he shoots out Dom's car tire, he gets into the truck on the left.
A real wild west stunt show would not use live ammunition.
Wire visible on the top of the villain's black hat just before Annie Oakley "shoots" it off.
Annie Oakley fires at least 20 shots at the villain in black from her two six-shot pistols without reloading.
When Dom gets shot at after following the property manager and drives down a hill, the mid 1980s Lincoln Continental transforms into an early 1960s Lincoln Continental. The car explodes in a ditch. When Hawke and Caitlin arrive in the Santini helicopter a few moments later, the car is out in the open and has transformed once again into what appears to be a late 1970s Plymouth Fury.
When Stern is firing the laser weapon at Airwolf, the closeups show him firing up from the right side of the Ford F-250's bed he is standing in yet the far away shots show him pointing the weapon straight out the back of the bed.
The motorcycle Hawk was riding to chase the bad guys was a Honda which has a 4-cycle engine, but the sound heard was that of a 2-cycle.
When Dom attempts to land Airwolf after getting hit by the Mongoose, you see a creek below. The next shot when he lands, there is no evidence of a creek.
After String and Annie are away from the truck, Dom says that they can't dodge lasers without turbos. Airwolf has standoff weapons that could be fired from outside the range of the laser. In fact, String used a "Copperhead" missile minutes later to destroy the truck and laser.