I love it - was issued the original 1st gen in 2003, and used it in Afghanistan. With a Redi-Mag and a BAD lever, you truly have a match made in heaven. The "cheaper" one you posted is actually the second gen. 1st gen dropped both mags when you hit the rifle's mag release. The "improved" one doesn't drop it's mag when you drop the empty in the rifle - it has it's own mag release. That's a good upgrade, IMHO. Hitting the rifle mag release, and having two mags to deal with at the same time - can be a bad time. Drop one, then drop the other, that's way better, I think (and used both). Now, on the "improved" one, you still have choices - you want the "Quick Attach" version. Trust me on that.