||These mags are great by far the most convenient but as far as buying an extra it's pointless if you have a 2000 or 3000 rd speed feeder then you will be faster at just dumping the bbs into the box.
That's how it was designed but if you do buy an extra you'll need an extra battery(small type 9.6 nunchuk) and some serious reloading skill.
Easy to refeed
Auto feed is super useful
Can potentially store two battery's
Reloading is about as slow as it gets.
Only real option for an m60.
Overall I'd recommend this if your m60's mag is flawed or worn out.
Rating: [5 of 5 Stars!]