JE Machine Tech AR-15 Ultralightweight Minimalist Full Top Rail 12 in No Anti Rotation Tabs Black. There are 7 MLOK rail slots that wrap around the circumference of the handguard. Specifications for JE Machine Tech AR-15 Ultralightweight Minimalist Full Top Rail: Manufacturer: JE Machine Tech Color: Black Finish: Anodized Fabric/Material: 6061 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Type: Free-Float Gun Rail: M-LOK Features of JE Machine Tech AR-15 Ultralightweight Minimalist Full Top Rail No Anti-Rotation Tabs Clamp-on system no timing required for easy installation Package Contents: JE Machine Tech AR-15 Ultralightweight Minimalist Full Top Rail Steel barrel nut and all mounting hardware included JE Machine Tech PS-223MLK12KBLK-F-NAR: AR-15 Ultralightweight Minimalist Full Top Rail 12 in No Anti Rotation Tabs Black