Optional sights Synonyms

Optional replaced

Definitions for Optional


  • (adjective) subject to one's freedom of choice
  • (adjective) possible but not necessary; left to personal choice

Synonyms for phrase

OS abbreviation

OS is an abbreviation for Optional Sights
What does OS stand for?
OS stands for "Optional Sights"

Sights replaced

Definitions for Sights


  • (noun) an optical instrument for aiding the eye in aiming, as on a firearm or surveying instrument