Retractable nosecone writing instrument

A writing instrument, comprising:

• a body, a nosecone, and an adapter, wherein the body, nosecone, and adapter each comprise a generally hollow tubular shape and an inner surface, outer surface, first end, and second end, wherein the first end of the adapter is coupled to the second end of the nosecone and the second end of the adapter is configured to slidably couple to the first end of the body, wherein the nosecone is selectively movable between an extended storage position and a retracted writing position;
• a writing element having a mounting end and a writing end, the mounting end being removably coupled to the second end of the body;
• and
• an extension element being configured to bias the nosecone toward the extended storage position,
• wherein the adapter further comprises a track, the track comprising a recessed channel in the outer surface of the adapter,
• wherein the body further comprises at least one protrusion, extending inward from the inner surface of the body and being configured to slidably engage with the track of the adapter, and
• wherein the adapter is dimensioned to retract within the body along a longitudinal axis of the writing instrument.