Valken 140-Round M4 Midcap Thermold AEG Magazine (Black)

Valken 140-Round M4 Midcap Thermold AEG Magazine (Black).  A standard midcap M4 in all polymer construction.  Compatible and works in all airsoft M4 airsoft guns. Very reliable midcaps for airsoft, doesn't rattle or weigh a lot in your pouches. These are a great budget M4 midcap for us in all airsoft AEGs.

They use the same mechanism that low capacity magazines use, except they are able to hold more BBs. They use a long serpentine spring wound through a channel to hold and then push the BBs out. They are a very simple design and less prone to failure than hicaps. Midcaps are useful in that they don't rattle like hicaps, but hold more BBs than lowcaps. Mid capacity magazines are the favorite of advanced players since they tend to test their aiming and trigger control abilities. The easiest way to load these magazines is with a speedloader.  Perfect for milsim games and events.