I picked up this Mossberg 44US. When I went to pick it up, it had thos sling on it. If this had markings on it they are gone now!

 

 

If you don't see any markings, go by color ...

 

 

Looks like OD7 ...

 

 

And whether or not the web gear was made by a shuttle loom ...

 

http://www.90thidpg.us/Equipment/Articles/Webbing/index.html

 

If any of the hardware is steel, it could indicate a mid-war make since brass was in short supply. 
 

 

 

 

 

 

I am sorry I am a little dense and not very smart. All the parts are steel. Does this look like a US sling made during WW2?

It's a US sling.

 

IMO, late war to post war production. 

47 minutes ago, the Bucket said:

I am sorry I am a little dense and not very smart. All the parts are steel. Does this look like a US sling made during WW2?

The steel parts suggest it's mid war production. Could also be a civilian model where the manufacturer used up supplies and made it cheap as possible. 

Okay, so it is possible this was a 1944 or later sling that could have been on a US rifle?

When looking at these slings in the wild, I always look at the buckle. If the buckle has a hump (like yours does), I pass as a probable post war sling. Most of the wartime fabric slings have the flat sided buckle (no hump).

 

Some late WW2 slings have the hump.

I have a Garand sling with a steel buckle and markings just black blobs to the eye. Using the old camcorder night vision trick , I can see that the sling is dated 1943. So either the humped buckles were being used in 1943 or the  buckles were added later. 

Buckles are easily swapped out. 

All kinds of shades.  There was a war on you know.