Optical key switches provide fast response time and performance without compromising build quality. They use infrared sensors as a replacement for metal contacts, making them more durable when compared to a standard mechanical key switch. With the Bloody B820R Light Strike RGB Animation gaming keyboard, it uses LK (Light Strike) Optical switches built exclusively for Bloody keyboards. The B820R comes in two variants; one with blue switches (Machine Gun) and one with red switches (Silent Gun). Benchmark Reviews already tested the B820R with LK Optical Blue switches, so our friends at A4Tech sent us the red variant for this review.