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MAG 170 Round Midcap Magazine for P90 Series Airsoft AEG (Package: Single Magazine)

ID: 32722 (MAG-MAG-P90-170x1)
4.3 stars, based on 11 reviews
MAG 170 Round  Midcap Magazine for P90 Series Airsoft AEG (Package: Single Magazine)
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  • High tension spring provides reliable feeding
  • Translucent polymer construction
  • Durable injection molded polymer construction
  • 170 round capacity
Color: Smoked Translucent
Compatibility: Tokyo Marui, Echo1 and other compatible P90 Airsoft AEGs
Capacity: 170 rounds
Materials: Injection molded polymer

Manufacturer: MAG

Why Mid-Cap Magazines?
Mid-Capacity magazines offer stealth operation by eliminating BB rattle often experienced with Hi-Caps. They feed smoother than Hi-Caps due to their high tension internal spring, similar to a real steel magazine. Since 470 round Hi-Capacity magazines don't exist in real life, a good amount of Mil-Sim players prefer Mid-Cap magazines for an even more realistic type of gaming experience.

Due to the design of all Mid-Cap magazines, they actually function better once you break them in. To do so spray some light silicone oil into the magazine, load and unload it a few times until BB's feed smoothly. This process breaks in the internal spring allowing it to function without problems each and every time.

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11 Customer Reviews

(Write a review)

by Robert D. on 06/14/2017
"So I ordered the 4 pack, not a single one fed properly after about 2 hours spent just trying to break them in. Plan on returning them
by Hideki Y. on 04/16/2017
"This mid-cap mag for P90 eliminates the infamous feeding issue of the hi-cap P90 mags. But the product is not without issue, which can and must be solved for this mag to be really useful.

The issue is that the feeding spring in the mag is too long, creating so much tension that there is no way in the wide world for the mag to accept the 170 rounds that the product name indicates. At least, this is the case with the ones that I have purchased. If you force it, your speedloader will probably break, or bbs shatter, or both.

You basically have to take the mag apart, pull out the spring, cut about 5 inches of it, put the spring back and reassemble the mag. With this work, the tension is such that you can probably load closer to the advertised 170 rounds. There appears to be some variance among these mags with the length of the springs, so you may have to cut more or less depending upon which spring you have encountered.

Once this is done, this mag performs well, virtually never encountering the feeding issue.
by Jayce D. on 05/27/2015
"So maybe I was given lemons, because my experiences were nothing like the ones in the reviews below me. I have tested these mags on 3 different guns and every time the results disappoint me. Allow me to explain:

I purchased 2 of these magazines about 3 years ago, and used them in my JG P90. After breaking them in, they worked pretty well... for a little while. After a few weeks they started to jam and misfeed 1 bb every couple of shots. Eventually it got to the point where it wouldn't fire up to 5 bbs at every few shots. It was getting pretty ridiculous so I simply just stopped using them and let my friend use them for his P90.

This is where things get even more outrageous. My friend who also own a JG P90 used these mags and for some reason 1 of them fed almost perfectly, and the other hardly fed rounds at all (at best it fed like 1 every 2 or 3 shots).

I decided to disassemble these magazines, which is actually quite easy, and clean them out entirely. I washed everything from the casing to the spring, to make sure their wasn't any dirt or unnecessary oil inside. After spending an hour doing so, I reassembled the magazines and kept them in storage for about 6 months (I didn't have a P90 at the time to test them).

Now today I was finally able to use them in my brand new Echo 1 AR-57. The gun itself is absolutely amazing and I have no problems with the included 68 round magazines. However once again I experienced difficulties with the MAG midcaps. Luckily, one of them (the good one) doesn't misfeed frequently. Every 5 shots it misfeeds 2, then works for another 5 and misfeeds another 2. It's basically a 5:2 cycle until the magazine is empty. On the other hand, the other magazine is like the complete opposite... it's more like a 2:5 cycle where it fires a couple rounds then misfeeds a bunch.

My assumption is that the springs are weak in these magazines, because I am positive that it isn't the guns' fault. I'm not sure if they are worth replacing, but that it my best guess as to why these problems are happening.

So there ya have it... these didn't work very well for me :(
However, because these magazines are rock solid and hold an enormous capacity for a midcap, I have given it 3/5 stars. I think that the design is good but the spring they used could have been a lot stronger. I will update this review if I end up finding a solution to this problem. For now I suggest getting the 68rd low-caps. They might feel cheap, but they are the only magazine to function flawlessly in all 3 of the guns mentioned above. The King Arms midcaps also look promising, so those might be worth a shot. As for these and the hicaps, they aren't worth your time.

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