I don't understand the previous posts of many low point reviews.
These Mags will get the job done. They're made of plastic and have a greyish tone which in my opinion gives a nice two tone on an anodized M4 receiver.
They DO feed well. The only thing you need to do like all other Mid Caps is to spray and shake some silicon to lubricate the spring and follower.
The only part that is faulty is the bottom. at the bottom is a weak circular plate that holds the spring. I suggest right as you purchase these be ready to super glue the plate shut for good. There is no real reason to take out the plate in the first place.
Cheap at 7 dollars a magazine.
They run very well
Will fit on many guns, I suggest calling ASGI to make sure if they will fit on yours to make sure.
Circular plastic plate that easily breaks/comes off. Fix it with super glue as soon as you get it.
Rating: [4 of 5 Stars!]