Editing FN MAG (section)

===Barrel===
The quick-change barrel has a slotted [[flash suppressor]]. The barrel's chamber and bore are [[Chrome plating#Hard|chrome-lined]] or [[stellite|stellite-lined]] for increased service life and the barrel has four right-hand grooves with a 305&nbsp;mm (1:12&nbsp;in) rifling twist rate. Also attached to the barrel is the front sight base, carry handle and gas block (equipped with an exhaust-type gas regulator valve with three settings).<ref name="remtek.com"/><ref>{{Cite web |url=http://www.usord.com/weapons/stellite |title=Stellite Lined Barrels |access-date=2021-09-22 |archive-date=2021-09-23 |archive-url=https://web.archive.org/web/20210923045006/http://www.usord.com/weapons/stellite |url-status=dead }}</ref><ref>{{Cite web |url=http://www.sadefensejournal.com/wp/torture-test-u-s-ordnance-mag-58m240/2/ |title=Torture Test: U.S. Ordnance MAG-58/M240 – Small Arms Defense Journal - Dan Shea - 28 February 2013 |access-date=22 September 2021 |archive-date=24 September 2021 |archive-url=https://web.archive.org/web/20210924180120/http://www.sadefensejournal.com/wp/torture-test-u-s-ordnance-mag-58m240/2/ |url-status=dead }}</ref> The barrel assembly weighs {{convert|3050|g|lb|2|lk=on|abbr=on}} and of the {{convert|630|mm|in|2|lk=on|abbr=on}} long barrel a portion of {{convert|487.5|mm|in|2|lk=on|abbr=on}} is rifled.<ref>{{Cite web|url=https://www.fnherstal.com/en/product/fn-mag|title=FN MAG®|website=www.fnherstal.com}}</ref> The MAG takes zero shifts between barrel assemblies into account by making the front sight of the assemblies adjustable with the help of tools.