Purchased these to replace the crappy high cap that came with me G&G. The fit great with only small amount of wobble. I love the full metal construction. I have no hesitation in dropping them or tossing them to a team mate. Was a little worry about the cost/value ratio, but after using them for a few months and getting used to them I am very glad I bought them. Like previously stated it is not a good idea to try to get the full 190 into them. I tryed and found that not only was it hard to get them all in but the first 30 shots didn't feed right and cause a huge air leak (reduced the guns range to about 10 feet). I now load them to about 140-150 and they shoot perfect.
Full metal construction
Good fit with almost all M4/M16 riffles
easy to load
Reliably holds/feeds 140-150 rds
Doesn't reliably feed all 190rds
Rating: [4 of 5 Stars!]