single-barrelled
1. [ adjective ] (arms) having one barrel
Synonyms: single-barreled
Examples:

"most guns are single-barreled"

Related terms: double-barreled
Similar spelling:   single-barreled
  single-shelled
  single-breasted
  single-bedded
  single-spaced
  single-minded
  single-handed
  single-channel
  single-celled
  single-mindedly
  single-handedly