Are they worth the money? Depends on what you are using them for.
Semi Auto? Man that is alot of trigger pulls.
Full auto? Man that is alot of fun.
I like 'em in 9mm, but then I shoot alot more 9mm than .223.
Does it work? here is a 100 round 9mm mag dump.
View My Video
Sometimes the audio and video don't mesh up. Don't know why.
If you watch the net, you can find them at good prices. There is a Korean knockoff version out there for around 160, but I've seen the name brand 223 mags go for 200 to 210 and their support is here in the USA.
Dave
That is awesome.