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Thompson 450 Round High-Cap Mag for M1A1 Tokyo Marui CYMA Pulse Rifle Airsoft AEG Rifles

ID: 28555 (MAG-Thomp-420)
435003 C33
Cybergun / Spartan Mil/LE806481488036435003 C3328555
4.7 stars, based on 9 reviews
Thompson 450 Round High-Cap Mag for M1A1 Tokyo Marui CYMA Pulse Rifle Airsoft AEG Rifles
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Cybergun / Spartan Mil/LECYMAKing Arms / Eagle Force


MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.


  • Durable metal alloy construction
  • Tokyo Marui system compatibility. Works for Tokyo Marui, CYMA, King Arms, Snow Wolf and compatible Thompson AEG rifles.
  • Best feeding Thompson magazine on the market. Factory direct for always latest / newest version.
  • Lightweight design with extreme robust and durable construction.
  • Works with both M1A1 and 1928 Thompson Airsoft AEGs.
Color: Black
Compatibility: Tokyo Marui Thompson/M1A1 Airsoft AEG rifles and other compatible AEGs. Pulse rifles.
Capacity: 420~450 rounds
Materials: Metal Alloy

Manufacturer: CYMA / King Arms

About Cybergun / Spartan Mil/LE

Cybergun is the world leader in designing and distributing replica dummy weapons for video game aficionados, sport or outdoor shooting, and collectors.

About CYMA

CYMA is among the oldest, most experienced and the largest Airsoft manufacturing facility in the world. Known for their unmatched quality control and professionalism, CYMA is selected to be the OEM of a vast amount of Airsoft products. Durability and performance meets affordability!

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.

9 Customer Reviews

(Write a review)

by John H. on 09/19/2017
"These are great! I upgraded both my M1A1 Thompsons and they shoot at 25 rps and 35 rps and the mags still feed well. Same goes for the midcaps.
by David B. on 03/04/2012
"I ordered one of these for my cousin. Works as a hi-cap should work. Taking it out is much smoother then with the mid-caps. Does not hold 420rd's holds around 360rds same as my old m4 hi-cap mag, exactly the same! I just filled my mag then transferred them all to this mag and it reached the top perfectly! He got another one of these at SC Viper for only $12 so this price is way to high. But I'm here to review the mag not the price.


Friendly tip, if you wind any hi-cap until you hear clicking it should empty your mag without having to wind it again, takes approximately a minute or so, works with M4, M14, P90, Thompson, etc. Make sure you don't make it click more then twice, I have not tried this, and I don't want to.
by Blake C. on 01/27/2012
"All right boys and girls, I bought 3 of these and they all work good now. What i mean is, when i bought the 3 of them, one did not work. After about a minute or so of winding the mag that did not work, i started to see a piece of what looks like to be a rubber band in the mag being pushed up. So i went and got some nettle nose pliers and pulled out the piece of rubber band, and now it works perfectly! The gun i have is the cybergun Thompson M1A1. Time for pros and cons.

-Hold a lot of ammo (420+ bbs)
-Made to last (More metal than plastic construction)
-The look they give the gun (Sexy)
-Operation is easy (Winding and filling)

-Rattling of the bb's (But its a high cap)
-The price (should be 13-17 dollars)
-Might find strange problem with mags at first (Rubber bands = ?)

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