초소형 미니건, 2017 shot show에 출품된 XM556 마이크로건
출처 - https://www.youtube.com/watch?v=WmSYePNs_IM
출처 - https://www.youtube.com/watch?v=WmSYePNs_IM
출처 - https://www.youtube.com/watch?v=BRO5W7uxZfw
출처 - https://www.youtube.com/watch?v=P4veQxu-NWM