Unwanted Spacing in between images

I’m currently working on the “How We Do It” section (Featured Work), and I’m trying to keep each thumbnail next to each other without spacing.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

Hey @MrInk! Looks like you fixed it? I don’t see any spacing!

Here is what I see on a 32" monitor for both designer and preview view:

Mines looks like that as well, but after awhile it spaces out.