I had needed standard or midcap mags for events in Ohio so when I saw that Airsoft GI had them I decided to place an order.

Initial impressions
They came in a small box with a picture of the mags on it along with the king arms logo. The mags are a nice flat black color but are made of plastic so their rather light. Still they feel solid. Now if you have a classic army G3 or classic army G3 metal body you will have to trim the top back corner of the mags otherwise they won't fit in. It only takes a few minutes to do with a dremel. If you try to force it you will break off the front of the mag well although it will still work because of the way the mags lock in.

Performance
So after I trimmed them I loaded them up and took them out side to try them out. All the mags feed flawlessly on semi and full auto. I loaded them up again and got the same results. I was very relieved at this because I had heard of problems with KA's m14 midcaps not feeding well.

Pros
Cheap (5 for 45 which is about the price of 2 TM standards)
Feeds well
Solid
Hold 110 rounds

Cons
Plastic
Need work for classic army G3's

Conclusion
If you've got a G3 and want something besides hicaps and don't want to spend a lot of money on TM standards go pick these up.