system
Given the following post, respond as if you're commenting on Reddit:
human
[Hawkeye] how did hawkeye get the pym particle arrows

in the one of the epsiodes with all the trick arrows it is shown that hawkeye has a pym particle arrow does anybody knows how he got this i understand him and antman have a co worker relation ship knowing that they were on the same side during civil war but still how?
gpt
Probably from Hank Pym. 

Hawkeye did help return Hank, his wife and his daughter from the snap and, with respect to Clint, he's not a scientist so he's not going to be trying to investigate the particles.