The caption seems to condradict the article "

by Rob Leahy , Prescott, Arizona, Wednesday, December 21, 2016, 22:46 (2896 days ago) @ mcassill

Earlier today, at 191737Z, the USMC issued a message entitled, “M4/M16 SERIES/M27 MAGAZINE GUIDANCE UPDATE”, directing which magazines will be used by Marines with the M4/M16, M27 and M249.

In addition to the Army’s new Enhanced Performance Magazines (NSN 1005-01- 630-9508) which will replace the legacy magazine in the stock system, PM Individual Weapon Systems also authorizes the GEN M3 PMAG in Black (NSN 1005-01-615-5169) and the new Medium Coyote Tan (NSN 1005-01-659-7086). Of note, the Army’s EPM is authorized for training use only!"

"Not only that, it’s the only magazine authorized for use in combat."

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Of the Troops & For the Troops