Kalamazoo, Mich.-based quintet Greensky Bluegrass is a harmony-enriched string band influenced by the sounds of Appalachia. Their music is reworked through a pop/rock perspective similar in spirit to the Avett Brothers, only more traditional and a lot jammier. Greensky are quite proficient players capable of holding their own against bluegrass true-bloods, judging from the sparks flying on breakneck tracks like “Bont’s Breakdown,” as heard on their recent live album All Access Volume 2. This fall, their fourth studio full-length, Handguns, put them on the bluegrass charts for the first time. It’s ironic because Handguns represents an attempt to broaden their palette and influences. You can hear it in the pedal steel peals of the country title track, the jazzy horns of the humorous swing tune, “I’d Probably Kill You,” and in tender strummy folk ballad, “Beauty and Pain,” powered by the sentiment, “If my path is to worry then I walk in shame, because I’d rather find beauty than pain.” Why should words and terms tie us down? Whether you call it bluegrass or breakfast cereal, these Greensky cats know how to cook up something tasty.