How to pronounce “gunmetal” in English

the weak penumbra of one of Hawkeye's few streetlights. Ira Ryan, a bony shard of a man in a red windbreaker and Lycra tights, takes shape out of the gloom, canted forwardover the handlebars of gunmetal, gray bike he welded together himself. Ira is a 30 year old native Iowan, a professional custom bike frame builder, a cycling zealot, and by virtueof winning the first and only completed Trans Iowa back in 2005, the events current defending champion. As he blows past us, Ira crushes his petal with an automatic remorselessness,