Submitted by György Chityil ... on Fri, 01/19/2018 - 23:17 Hierarchy: NounDescription: {{context|firearms}} The gap between the face of the bolt and the stopping surface for the cartridge.Ngram: headspaceNgram Text: headspaceSource: WiktionaryIssue: 0Wiktionary tag: firearmsNgram Count: 1