GUNS & AMMO: PMAG Gen M2 MOE 5.56 Window 30rd Black & FDE - E-Arms - $11.25 ea + Shipping
PMAG GEN M2 MOE 5.56 WINDOW 30RD BLACK
PMAG GEN M2 MOE 5.56 WINDOW 30RD FLAT DARK EARTH FDE
Kudos to slickguns for the heads up, as they linked the 40 round magazine but while browsing the website, I found the window mags.
Remember these are gen M2, not the newest M3. Great AR-15 magazine.for the price. Not the best price ever, but certainly the best I've seen in recent times. Shipping was about $10 for me. Would definitely be worth it if you get a bunch.
Here's the 40-round magazine on sale as well - $15.25
Mind your State's laws as this is not allowed in some States.