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King Arms 60 Round Mid-Cap Magazine for M1A1 / Thompson Airsoft AEG Rifles (Package: Single Magazine)

ID: 54571 (MAG-KA-MAG-45-BKx1)
King Arms / Eagle Force859188545717KA-MAG-45-BKx154571
5.0 stars, based on 3 reviews
King Arms 60 Round Mid-Cap Magazine for M1A1 / Thompson Airsoft AEG Rifles (Package: Single Magazine)
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King Arms / Eagle Force



  • Durable polymer construction
  • Lightweight design won't weigh you down on the field
  • 45 round capacity is perfect for MilSim events or re-enactments
  • Works with both M1A1 and 1928 Thompson Airsoft AEGs
Color: Black
Compatibility: Tokyo Marui Thompson/M1A1 Airsoft AEG rifles and other compatible AEGs
Capacity: 60 rounds
Materials: Injection molded polymer

Manufacturer: King Arms

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.

About King Arms / Eagle Force

King Arms was founded in 2004 with the mission to ensure optimum customer satisfaction by providing precision products and outstanding service. In 2015, we moved our headquarters from Hong Kong to Taiwan where we've continued to provide excellent products with the highest quality. While working with leading firearms manufactures, we provide to our customers a level of innovation and authenticity that can't be found anywhere else in the Airsoft industry. This goal is what continuously drives us to improve and gives us purpose.

3 Customer Reviews

(Write a review)

by Ethan H. on 01/17/2021
"These magazines work beautifully, I played the on the field and the only problem was that they where a little tough to get in and out. Other than that these magazines feed every time, would recommend.
by Anthony L. on 12/10/2020
"I really like these mags. They are VERY lightweight (might be a turn off for some), feed perfectly, and seem pretty durable (time will tell). A little tight fitting in my CYMA Thompson, but seat beautifully after a nice quick slap. I’d recommend them for sure.
by Andrew E. on 09/26/2017
"These are the mags that come with the King Arms Thompson, and so far, I've only had great experiences with King Arms mags. They are plastic, but extremely durable and strong. They don't creak or rattle. They're very light, which helps as the Thompson is heavy enough. If you own an M1A1, and you are looking for a mid-cap, this is the best you can get.

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