This is a combined synopsis/solicitation for a firm-fixed price, sole-source contract anticipated to be awarded to Mission Systems Davenport, Inc. for the purchase of oxygen regulators. The contract is a one-year base period with one one-year option, for a total performance duration not to exceed two years. Delivery orders will be issued as spares are required and funds are available. The solicitation includes several attachments detailing the schedule, terms, and a justification for other than full and open competition.