Nearly there

Alex who was chasing after his grandfather took out another pistol from his waist. Now he was holding two handguns on both hands. Alex continued shooting at his grandfather who evaded by running towards a corner of the hallway. Seeing that Alex replaced the bullets with his specialized rubber bullets, and started shooting at the walls. The bullets Alex shot ricochet off the walls and bounced towards the corner Richter ran towards.

Once Alex turned towards that corner, he couldn't spot his grandfather. Alex then felt danger coming and leapt forward, seconds later he heard gunshots. Alex looked behind and saw his grandfather hiding above.

Richter who had failed his surprise attack jumped down from his hiding spot. The moment Richter landed Alex was already inches away from him. Alex's gun that was on his left hand was now pointing at Richter's face, while the gun on his right hand was pointing at Richter's heart.