Thompson M1A1 Magazines by Tokyo Marui
Designed to work with the Marui Thompson M1A1, these mags are available in 3 styles. Standard / low cap mag holds 60 rds, mid cap mag holds 190 rds and is actually shorter than the standard mag, and the high cap mag holds 420 rds and is the same size as the standard magazine.
The low cap mags are spring loaded - simply fill with BB's and shoot. The mid and high cap mags must be manually wound before firing. Be cautious not to over-wind the high cap mags or you may strip a gear inside the magazine.
NOTE: Low cap and mid cap mags are spring loaded. Simply fill with BB's and shoot. The high cap mags are gear driven and must be manually wound before shooting. It is common for high cap mags to not shoot all of the BB's inside, due to the nature of the gear system. Please be careful not to over-wind high cap mags or they may strip a gear. *High capacity magazines carry no warranty*