Not for all mags - Butler Creek Asap Magazine Loader Universal AR15 / M16

Very compact and lightweight. Works great with pmags. Not so much with gi mags. Tried it on every magazine I own. Pmags loaded flawlessly. Tried numerous times on all my gi mags and could not get more than two or three rounds in before it bound up. It does work with gi mag if you use the "one at a time" configuration. Thought about returning but I own more pmags than gi mags so I decided to keep it. I have not tried loading off a stripper clip so I cannot comment on its function.