McAlester Army Ammunition Plant has issued a Request for STONE, RR BALLAST NO. 4 (See posted solicitation for additional requirements.) FOB Destination – SIERRA ARMY DEPOT, HERLONG, CA. This solicitation will be issued via the internet at https//www.sam.gov and will close 16 JUNE 2021. Questions or offers should be e­mailed directly to PRIMARY: [email protected] ALTERNATE: [email protected]. Any changes to the solicitation shall also be posted to this web site and it is the contractor's responsibility to check site daily for any posted changes. All contractors who provide goods/services to the DOD must have a current active registration at System for Award Management (SAM) - https://www.sam.gov