Description
EMG PWS Series 120rd Mid-Cap Magazine for M4/M16 AEG Series (Black)
This is a 120-round mid-cap magazine from EMG under the PWS name, made for M4 and M16 series AEGs and finished in black. A mid-cap holds a useful number of BBs without the rattle or winding of a high-cap, which is why it is the standard choice for many players and sites.
EMG produces officially licensed replicas and accessories carrying real-world brand names. Primary Weapons Systems (PWS) is known for its AR-pattern rifles, and EMG builds licensed PWS replicas.
Why mid-caps
A mid-cap magazine uses a spring-fed column of BBs, so it feeds smoothly without winding and does not rattle as you move. Many sites and game formats limit players to mid-caps or low-caps, so a set of reliable mid-caps is the backbone of most loadouts.
The 120-round capacity named in the listing gives plenty of shots between reloads while keeping the magazine quiet and simple to use.
Loading
Load with a speed loader through the feed lips, keeping the loader pressed firmly in place. Insert the magazine fully until it clicks, and give the trigger a few test shots at a safe backstop to make sure it feeds well in your replica.
Key features
- Mid-cap AEG magazine
- 120-round capacity (as named)
- For M4 and M16 series AEGs
- PWS name under EMG
- Quiet, no winding needed
- Black finish
Compatibility
Listed for M4 and M16 series AEGs. Most M4 AEGs follow the Tokyo Marui standard magazine pattern, but fit can vary slightly between makers, and these will not fit gas blowback rifles or Tokyo Marui Next Generation recoil models unless stated, so test the magazine in your replica before relying on it in a game.
Care and maintenance
Use good quality seamless BBs and keep the magazine clean, as dirt and broken BBs are the most common cause of feeding problems. Empty magazines before storing them for long periods so the spring is not kept compressed, and keep them somewhere dry.
If a magazine starts to misfeed, check the feed lips for damage and remove any debris.
Who is it for?
It suits M4 and M16 AEG owners who want reliable, quiet mid-caps for sites or games that limit magazine capacity.
Please note: BBs and a speed loader are not included.









