Corrected entry: When the sniper is first shown drawing a bead on 8-Ball, the camera shows her looking down the barrel of an SKS, a semi-automatic weapon. When Joker surprises her, she spins around and begins shooting at him with an AK-47 or similar fully-automatic rifle.
johngalt46
16th Jan 2018
Correction: The rifle that the sniper used was a Czech-made SA Vz. 58. The original poster may have mistaken this for an SKS rifle due to its charging handle. To clarify, she was using this weapon in both scenes, when she shot Eightball and when she fires at Joker. There is no continuity error.