Other mistake: When Johnny Cage is fighting Scorpion in the forest, after Scorpion unleashes his snake-like spear from his hand but before the camera switches to Johnny, you can see the spear move down and it appears to be coming out of his forearm. Also the hole in Scorpion's hand from the spear is now gone.
Other mistake: As Reptile falls backwards over the table, you can see the brand name of the sneaker he is wearing on his right foot.
Answer: Sonya's pistol looks to be a Glock, Model 17 or 19. It looks like the barrel was broken off up to about the front end of the trigger guard. If she fired it like that, the bullet would have significantly reduced muzzle velocity because the recoil spring is gone (it would be in the front part of the weapon that was frozen and broken off.) The remaining part of the slide wouldn't have any resistance working against it. Not only would that result in less pressure inside the chamber during firing, but it would also most likely send the slide back into Sonya's face if she pulled the trigger.
Mobrien316