I don’t follow Everyday-Cutlery, nor do I have an Instagram so I have no idea who Mayhemworks is.
The image is hyperlinked if you click on it, redirecting you to the imgur source. I found that image on gunspics.com on page 70-something.
I did a reverse image search on Google and it brings…
It took me approximately 15-20 seconds to find the original source for the pic in question (which just so happens to be Everyday Cutlery. And I used google image search. Simply put, there’s a pretty damn good chance the image with the highest resolution in the ‘view all sizes’ is the original source, because people who copy and repost tend to not save the high resolution full view file but rather the smaller one tumblr puts on dashboards. This is one of the easiest ways to find a source for something, at least in cases like this. (It is not fool proof though it will not work all the time)
Another thing to be done, and this is directly for blogs with content like gunrunnerhell, is to go here. http://imgur.com/r/gunporn/ about 95% of those posts have the [OC] tag on them, which means they’re Original Content, and thus easily sourced. The moderators for that imgur/subreddit are very dedicated towards proper sourcing and listing exact resolutions and everything, so it’s easy to use and where I tend to go when I want to post a tidal wave of firearm pics here on tumblr.
Now none of this is meant to be demeaning or condescending towards gunrunnerhell, I’m just trying to give some advice so it’s easier for him to find source for material in the future.