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Home » Accessories & Parts » Airsoft Gun Magazines » Electric Gun Magazines » Shop By Gun Model » M4 / M16 Magazines

Poseidon 180 Round Midcap Magazine for M4/M16 Series Airsoft AEG Rifles
(Color: Black)

ID: 67566 (Mag-Poseidon-M904-BK)
M904 MAG BK - Matrix Packaging Single Pack
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Poseidon

$11.95

This item is currently Sold Out

Color Options:
ColorBlack
ColorTan

Description

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Product Description

Features

  • Durable high strength polymer construction
  • Good compatibility with major brand M4 rifles
  • High strength spring ensures reliable feeding
  • No rattling sounds unlike high capacity magazines
  • Lightweight construction makes it easy to carry multiple magazines

Manufacturer: Poseidon

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.

15 Customer Reviews

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by Jack M. on 06/27/2025
"Great mags for a good price

These are the same ones that come with the Matrix Calico Jack, they fit nicely and have a good capacity
by Joshua G. on 02/27/2025
"Pros:
-Great quality
-On higher spectrum for mid cap bb capacity
-Sturdy
-Great feed

Cons:
-Not necessarily a con but, the mag does have a very very VERY slight wobble, so it’s not entirely steady, but not enough to be an annoyance.
by Adrian Y. on 01/11/2025
"Used in my Specna Arms Core M4

Pro:
Feeds well
Cheap but sturdy.

Con:
Needed to put a little Velcro on the back of the magazine to reduce wiggle and improve feed consistency. Probably a specna specific issue.

Other than that, it’s a great mag for the price.

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