Midwest Industries Midwest Industries HK SP5K/MP5K Handguard, M-LOK One five slot M-LOK compatible rail included. Features two anti-rotation QD sling swivel sockets. Constructed of 6061 aluminum, hard coat anodized for a lifetime of service. 100% Made in the U.S.A., 922R Compliant. MSRP: Was: Now: $124.99