During a hand combat (fight) scene in the parking lot between Special Agent Kensi Blye and Private Scott Riley when Kensi is pushed to the ground lying prone, you can see a protective pad in her lumbar region; she is also not carrying a sidearm. Later, during the same fight/foot chase scene she arrests the Private and is now carrying a holstered sidearm on right rear belt.
When Callen and Reilly arrive at the camp, the left mirror of the car is shot off by the guard. A few minutes later they enter the camp and the left mirror is undamaged, as seen from inside the car.
When Kensi uses the laser attached to the M4 Carbine to signal Callen and Sam using Morse code, she uses the laser pointer to 'flash' on G's head. However, when the views zoom in to show the scene through the scope, the lines indicating where the gun is aimed is about a foot above and half a foot to the left of the laser is aimed, indicating either the scope is not dialed in, or the pointed isn't adjusted for range. Either mistake would make the device useless, meaning the scope isn't able to function properly, or the laser dot wouldn't show the proper trajectory.