Editing GRENADIER-class Mjolnir

The Mark IV [G] prototype{{Ref/Note|Although the ''Halo: Reach'' Armory consistently describes the [G] variant ''itself'' as a prototype, ''Halo: The Essential Visual Guide'' makes no mention of this, instead stating that GRENADIER is ''derived from'' the first Mark IV helmet prototypes. While the book's description may stem from a misinterpretation of the original source, both are represented in this article since they do not contradict one another.}} was introduced just over a decade after Mjolnir entered service.{{Ref/Reuse|Id=EVG}} Intended to provide additional protection from concussive force, the Mark IV [G] helmet is an up-armored version of the first Mark IV prototypes,{{Ref/Reuse|Id=EVG}} with an expensive lightweight composite shell.{{Ref/Game|Id=HI|HINF|Armor customization (Halo Infinite)|Armor Hall|Detail=Grenadier - Helmet Description|Quote=GRENADIER helmets are officially categorized as prototypes, as [[UNSC Special Forces#Naval Special Warfare Command|NAVSPCWAR]] wrestles with the overwhelming cost of its lightweight armored composite shell.}} The [G] variant served as the basis for all subsequent supplemental armor development programs; it is compatible with later models such as the [[MJOLNIR Powered Assault Armor/Mark V|Mark V]]. The [G] variant served as a test bed for incorporating energy shielding technology with the MJOLNIR program,{{Ref/Game|Id=Armory|HR|Armor permutations (Halo: Reach)|Armory|Detail=Collar/Grenadier - Description}} although these tests were ultimately unsuccessful;{{Ref/Book|[[Dr. Halsey's personal journal]]}} energy shielding had previously been tested as of [[2531]].{{Ref/Book|Id=EVG119|Halo: The Essential Visual Guide|Page=119}}{{Ref/Note|''"Energy shielding was a key feature of Mark V, although other Spartan squads had field-tested prototypes of this technology as early as 2531."''}}