Lot of 4 HFC Airsoft Short Pistol Magazines

They are weighted and are 7oz each

They look to be in pretty nice shape. I have no idea what pistol these would fit. All 4 are the same. 

I bought a large amount of airsoft stuff at a local auction for the purpose of reselling. I've never played airsoft and know almost nothing about it. Some of this stuff I have very little information about. I'm open to questions and any additional info/help.