MSAR’s XM Series AR-15 magazines had some significant issues when they were first introduced. However, they have been through a handful of revisions since and MSAR is very excited about the current generation of magazines. My experience with the previous magazines was very limited but I really liked the handling characteristics of these magazines with the aggressive crosshatched texturing and flared baseplate. I like the form factor enough that I am very interested in the latest revisions.
Soon there will be 40 more reasons to be interested in these magazines. MSAR will be releasing a 40 round capacity version.
Check out the MSAR XM Series Magazines at BladeHQ.