Maglula lets you unload and 10/22 style magazine in seconds. Need to transport your magazines unloaded, this is the solution you have been waiting to be made. This does not load magazines. 

Specifications and Features:
Maglula LU32B 
10/22 type .22LR Universal Magazine UnLoader 
Simple to use
Super-fast unloading
Eliminates thumb pain and injury
Eliminates wear on feed lips
Prolongs magazine life
Lightweight and fit in pocket
Reliable in all weather
Durable reinforced polymer
Black

Fits:
Ruger factory mags
Butler Creek
Black Dog
Eagle
ProMag
Shooters Ridge
Tactical Inc.
And Similar

Note:
The UnLoader will not unload rounds well from low quality and/or faulty magazines; it will further have difficulty unloading rounds with flat tip.