Things I liked: The magazine cycles good through the gun and is well made.
Things I would have changed: Just like on my 300 magazines do away with the spring around the mag. I don't get it. Sumatra has the same type magazines without the spring so you would think ShinSung could do the same. They are brother companies afterall. This is why they get a 4 for value!
What others should know: These are quality made but a bit overpriced wherever you try to get them. They should be $10 tops.