Strike Industries KVHGBK Strike Handguard Black 6061 T-6 Aluminum 5.59" Long The Strike Handguard For KRISS Vector SDP adds More Functionality And Usability To The Vector Platform With M-LOK attachments. This Handguard Mounts quickly And Directly To All KRISS Vector Lower receivers But Is Specifically Designed For The SDP Model With a 6.5 Barrel. This Strike Handguard Fits suppressors Up To 1.90 (48.26mm) In Diameter And Is Also Designed To Work With Vector CRB Square Or Round Barrel shrouds. Machined From 6061-T6 Aluminum, This 1-Pc Free Float Handguard Is Designed To Minimize Weight And Increase Strength. Material: 6061 T-6 Aluminum