At 12.28 into Episode 2 (film split in GB), Jason Monk shoots an assailant through the stair rails with a silenced gun. After the assailant is seen tumbling down the stairs, viewed from the bottom, something akin to a rifle barrel is seen sticking out, being lowered and quickly withdrawn from behind the bannister at the top of the stairs.
When Monk shoots at the assassin's van in the park, the window on the side door breaks completely. In the shots that follow, however, the window is broken only at the top.