▁spent ▁cart ridge ▁and ▁the ▁re loading ▁cycle ▁when ▁the ▁rif le ▁is ▁dis charg ed . ▁The ▁operating ▁rod ▁( and ▁subsequently ▁the ▁b olt ) ▁then ▁returns ▁to ▁its ▁original ▁position . ▁ ▁The ▁M 1 ▁Gar and ▁was ▁one ▁of ▁the ▁first ▁self - loading ▁rif les ▁to ▁use ▁st ain less ▁steel ▁for ▁its ▁gas ▁t ube , ▁in ▁an ▁effort ▁to ▁prevent ▁cor ros ion . ▁As ▁the ▁st ain less ▁metal ▁could ▁not ▁be ▁par ker ized , ▁the ▁gas ▁tub es ▁were ▁given ▁a ▁st ove - black ening ▁that ▁frequently ▁wore ▁off ▁in ▁use . ▁Unless ▁the ▁gas ▁t ube ▁could ▁be ▁quickly ▁rep aint ed , ▁the ▁result ant ▁gle aming ▁m uzz le ▁could ▁make ▁the ▁M 1 ▁Gar and ▁and ▁its ▁user ▁more ▁visible ▁to ▁the ▁enemy ▁in ▁combat . ▁ ▁Access ories ▁ ▁Several ▁access ories ▁were ▁used ▁with ▁the ▁Gar and ▁rif le . ▁Several ▁different ▁styles ▁of ▁bay on ets ▁fit ▁the ▁rif le : ▁the ▁M 1 9 0 5 , ▁with ▁a ▁ 1 6 - inch ▁( 4 0 6   mm ) ▁bla de ; ▁the ▁M 1 ▁with ▁a ▁ 1 0 - inch ▁( 2 5 4   mm ) ▁bla de ▁( e ither ▁made ▁standard ▁or ▁short ened ▁from ▁existing ▁M 1 9 0 5 ▁bay on ets ); ▁and ▁the ▁M 5 ▁bay on et ▁with ▁ 6 . 7 5 - inch ▁( 1 7 1   mm )