Changes

The Phobos Pattern Bolter, officially known as the Phobos R/017 Pattern{{Fn|18g}}, is closely associated with Mk II ‘Crusade’ Armour and is perhaps the most venerable design of the [[Bolter]] used by the Adeptus Astartes. This weapon was .70 caliber as opposed to the .75 round most associated with the Bolter today.{{Fn|36}} Phobos pattern bolters were hand-crafted by the Fabricators of [[Mars]] at the very birth of the [[Imperium]], to ensure that every Marine had the finest wargear with which to reunite the scattered elements of Humanity during the [[Great Crusade]].{{Fn|29}}

The '''Tigrus Pattern Bolter''' was first discovered in the depths of [[Forge World]] [[Tigrus]] and the STC data for it was quickly disseminated throughout the Imperium before the beginning of [[Horus Heresy]]. The Tigrus pattern Bolter is a .60 caliber weapon as opposed to the modern .75 standard.{{Fn|36}} Tigrus is now lost, yet the Bolters that bear its name, though no longer produced, continue to see service in the 41st Millennium.{{Fn|29}}