While many sites offer CBR/CBZ files, it is best to stick to reputable sources to ensure "extra quality" scans and support the series' longevity. Dark Horse Comics

Commando Comics are in the public domain. However, a handful of very early issues published before 1964 in the US without renewed copyright might be—but proving that is legally complex. Assume all Commando issues are copyrighted until 2056+.

The Ultimate Guide to Commando Comics: History, Themes, and High-Quality Digital Reading