Troy Industries are now selling one serious .223/5.56 magazine dubbed the Battlemag. After seeing what Troy Industries did to its new magazine, I would say it completely deserves its name. The new Troy Battlemag features reinforced feed lips and anti-tilt follwers and a robust floor plate which is flush with the magazine making it less likely that the battlemag will snag on other magazines in your pouches.
This new ridiculously durable magazine is available in the normal tacti-cool colors of flat dark earth, OD green, and of course black. Troy’s battlemags were designed to fit all M4/M16/Ar-15 type rifles along with the HK416 (MR556A1 civilian version) and FN SCAR 16s. The Battlemags come in packs of 3 at $42 which also includes a limited lifetime warranty. Check the video below of the Troy Battlemag taking some serious damage while still functioning afterwards.