KEYMOD or M-LOK?
Lucas Botkin answers the question many people are asking today. NSWC CRANE Study: http://www.dtic.mil/ndia/2017/armament/McGee19427.pdf Firearms used: Sig Sauer MCX BCM 13.7 BCM 14.5 BCM 11.5 ADM UIC 2 FNH SCAR 17 (13.7 length) Daniel Defense 5V1 SOURCE