I'm assuming Dirks is Larx 3, the credits and video description both refere to him as Larx 3.

Short answer: yes.

Long answer: unlike the leg shot it isn't explicitly shown (or was edited out). Larx 3 has 3 shots as Aaron flies past at the end of the street.
The 3rd shot hits him in the leg, from the angles it must have been the 1st shot that just grazed his left shoulder, if you closely you can see a slightly ripped-up jacket shoulder shortly afterwards just before he spins his bike round.

It's the shoulder wound that causes Aaron to drop his gun after wounding Dirks in the shoulder, it also explains his shoulder bandage on the boat as they sail away.

Short answer: Yes.

Unlike the leg shot it isn't explicitly shown (or was edited out). LARX #3 fires three shots as Aaron flies past at the end of the street. The third shot hits him in the leg, so, from the angles it must have been the first shot that just grazed his left shoulder. If you look closely you can see his jacket being slightly ripped-up shortly afterwards, just before he spins his bike around.

It's the shoulder wound that causes Aaron to drop his gun after wounding LARX #3, and it also explains the shoulder bandage he's wearing on the boat as they sail away.