Angry Gun did make some improvement on it, They have adjust the flow of the gas and manage to tweek the feeding lip a bit so it feeds a lot smoother
Angry Gun MP7 Performance Enhanced Gas Magazine
Full Metal Made
High Flow Valve (Upgraded Magazine IP Gas Seal)
Design for Umarex / KSC / KWA MP7A1 Airsoft Gas Blowback Sub-Machine Gun
Long Type 40 Rounds Loading Capacity
SKU ANGRY-MAG-MP740 Item Weight (gram) 440 Major Color Black Loading Capacity 40 Rounds Magazine suitable for marex / KSC / KWA MP7A1 Series Airsoft GBB SMG Magazine Type Standard Bullet Type 6mm BB Manufacturer ANGRY GUN
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Value Quality Priceon 8/5/12
I just recently bought five of these magazines for my brand new MP7, and here's what I think about them, be aware that while I'm mostly going to point of the cons, that does not mean that there are no pros, just that unless the contrary is mentioned about a feature, it works properly.
Heavy and solid build, feels like the KWA with smooth finnish, although the shade is slightly more to the dark matte gray.
Cycle performance and leakage:
Cycles great without any signs of irregular rate of fire. Holds a gas amount equal to that of a KWA original (in other words; sufficiently). After 48hrs, a few of the mags have let go of some gas, still able to fire a full mag's fill, but with noticable slow down at the end.
First of all, the mag catch "latch/dent" on the front is not shaped quite like the original magazine. In fact, two of the mags had to have the latch filed down in the middle to be able to lock at all. The key is to use a round tool and immitate the shape of the KWA.
The shape of these were also very inconsistent. On the three mags that did not need modification, the latch was so small that I did not dare to modify it, while the other, like previously mentioned were to large in the middle and would not let the catch go over.
This is an easy to fix problem that should have been addressed at the factory. Be very careful not to file too much off, risking to completely remove the ability to catch, and use fine tools and sand paper. Sharp edges will ruin the polymer catch on the MP7.
A second problem was that one of the magazines had passed trough inspection with a broken valve, pin sticking out all the way.
This may have been first apparant after the gas fill, since I did not notice it untill I tried to put it in the MP7 after two days on storage (they did not come filled, but properly lubed).
The last con is that the exterior build isn't quite as good as it is on the original KWA magazine. The paint is already coming of at the wear points and exposing a dull metallic finnish underneath.
I expect these to look quite externally abused after some games.
The finnish also is alot more crude around the edges, unlike the smoothness of the original one, but at just two thirds of the price, these asthetic imperfections were to be expected.
Holds tight for a sufficient amount of time.
Feels heavy and sturdy.
Easy on the wallet.
Poor exterior when closely inspected
Needs modification to work properly with the mag catch, not modifying the ones that do work may cause uneccessary wear on the mag catch.
Broken valve slipped though QC (this may just have been a one timer).
If you are looking for a magazine that will do the job but needs a little love to perform at its peak, you're not going to regret saving those bucks off the original mag (not to mention availability). But if you are expecting perfection out of the box you're going to be dissappointed.