society > armed hostility > military equipment > weapon > device for discharging missiles > firearm > parts and fittings of firearms > [noun] > breech > part of
breech-part1858
breech-piece1862
1862 F. A. GriffithsArtillerist's Man. (ed. 9) 190 The breech piece is a cylinder..bored, turned, and shrunk upon the end of the barrel.