My local gun shop has them. One 60 round mag, $129.00. I can but a 30 round mag for $10. So i had rather put my money in 12 30 round mags rather than this unproven gimmick.

 

I have a 90 round drum magazine for my AR-15. Besides looking cool, that is a lot of money to tie up in 1 magazine.

I would suggest that someone buy an expensive magazine only after they have plenty of other mags stockpiled.

 

For my money.. and my opinion... huge capacity magazines are a novelty.
Too heavy, bulky, and impractical for my needs.
Maybe if I had a full auto weapon, and anticipated being the squad suppressive fire guy..
but, I'm not.

 

I bought my share of 30-rounders but then on a whim bought some 20-round Pmags. What a difference! The look better in the gun, they're less likely to catch on something, they can be used with my Lead Sled shooting rest and swapped out w/o having to take the gun out of the rest.

The 20-rounders are my new favorite magazine.

 

I shot one this weekend after a 3-Gun match. Nicely made magazine with a smooth follower and spring and solid construction. We ran it through a Class III M4 and it did fine. For the most part, the reaction was "Meh, too expensive", except for the Open shooters who are always looking to go faster regardless of cost.

Supposedly works in any AR, SCAR, Robinson, ACR, FNC and so on.

 

How heavy is that sucker loaded?

Might be nice for a a fixed position, but not to hump around. You might tie up a lot of rounds when you need them, if it failed

 

I got to play with one for an afternoon. They are pretty heavy. And man do they take a while to load.