The phrase "twin pistols" refers to two guns that are similar and used together at the same time.
Sentences with «twin pistols»
In the gameplay footage, we can see his signature twin pistols, a knife, grenades and possible some version of a Batarang, but that's only for starters. (cbr.com)
Dante once again has access to a nice selection of weapons gained throughout the campaign, in addition to the classics like the sword Rebellion and twin pistols Ebony and Ivory. (glitchcat.com)
I suppose this is her new signature rather than the classic twin pistols. (thezombiechimp.com)