Help me identify this pair of AR mags

[R.W.Dale]

They both have M16/M16A1 Cal.5.56 Universal Inds div stamped on the bottom

 

[Gary G23]

http://www.ak47.net/forums/topic.html?b=3&f=17&t=190108

 

[saltydog]

I've got a pair also. My uncle retired from the air national guard. Mags were in bad shape but I kept the floor plates. My guess is they were made for the military.

 

[MisterPX]

Those are 20 round mags for the AR15/M16. Mfg'd by Universal Industries. Probably have an alloy follower. Anyhow, you probably already know that, so what exactly is your question on them?

 

[R.W.Dale]

I was planning on listing them with some other junk I've collected, Being a non AR type I just wanted to ensure I described them properly. What do you think would be a realistic selling price.