I fear many folks see the term "military" in a post and vision large purchase, DOD-wide, sanctioned and somehow "approved, or "authorized" use of this or other products. As here, this is often not the case, where the term refers to an individual, or unit commander using either personal, or discretionary funds, Gov't credit card, etc, to make a small purchase.
Obviously, system-wide the Army has not adopted, recommended or approved the use of the stated followers. Mags are disposable items, so they aren't likley to be inspected for non-authorized mods.
It makes no sense for a military unit to spend $2 each mag to replace a follower for the following reasons:
1) Mags are non-repairable items
2) Mags in the cited case have Black followers.....obviously not recent vintage
3) Mags of this vintage may have other less obvious damage / wear
4) New mags are available & cost the unit < $10
Does it make sense for civies to repair / upgrade mags? Perhaps, depending on their location & any local bans on purchasing new ones.
SOCOM....I'm not worried....They'll get their mag w/self-leveling follower...
Hotgun