So I got lucky and found a "used" one on GunBroker. These things are truly awesome! The unit I got is the skeletonized version (weight savings for sure) that allows you to see all the rounds loaded. The quality of the unit is very good, even aircraft mfg good. Fit and finish is super and unit itself is compact. XProducts sells two versions, one is solid (this unit is actually the best tactical version, as the solid shell prevents dirt and debris from getting into the device) and the skeletonized unit which is the sexy option (looks so cool). Both are finished in a nice dark blue/black matt color. Now, loading. View the YouTube tutorial, really helpful. The drum loads easily and until you get to about 43 or so rounds, the spring tension is pleasant. The drum locks into place in my M1A's (I own several) which are all standard configuration guns. The drum weighs a bit over 5lbs loaded and balances nice with the gun. My normal preference is the USGI type 20 round magazines, however if you are considering a drum for FA fun, then this is an excellent product. Be prepared to pay, as it will run about $300 before tax and shipping. Anyone out there have any other experience with this product? For the record, I paid for my unit and have NO affiliation of any kind with XProducts. Just a normal buyer...