SIG SAUER MCX Rattler Low Profile M-LOK Handguard 5in 5.56mm Aluminum Black. 56 SIG MCX Rattler this 5-inch handguard sports M-LOK mounting options and a low profile. Specifications for SIG SAUER MCX Rattler Low Profile M-LOK Handguard: Manufacturer: SIG SAUER Gun Make: SIG Sauer Gun Model: SIG Sauer MCX Handguard Length: 5 in Color: Black Handguard Material: Aluminum Condition: New Mount Type: M-LOK Attachment Type: Low Profile Fabric/Material: Aluminum Package Contents: SIG SAUER MCX Rattler Low Profile M-LOK Handguard SIG SAUER Infinite Guarantee What firearm models does the manufacturer say SIG SAUER MCX Rattler Low Profile M-LOK Handguard is compatible with? The manufacturer says that SIG SAUER MCX Rattler Low Profile M-LOK Handguard is compatible with SIG Sauer MCXSIG SAUER HGRD-MCX-R55-MLOK-BLK: MCX Rattler Low Profile M-LOK Handguard 5in 5.56mm Aluminum Black