Presma 223/5.56 Super Light M-LOK Free Float Handguard w/Partial Top Rail 15 in Black. 56 Free float rail mount with partial Picatinny Top rail and M-LOK slot system. Steel barrel nut included. CNC machined from Quality aluminum and black anodized. Super light weight only 14oz with barrel nut. Specifications for Presma 223/5.56 Super Light M-LOK Free Float Handguard w/Partial Top Rail: Manufacturer: Presma Color: Black Gun Make: AR Platform Gun Model: AR-15 Handguard Length: 15 in Features of Presma 223/5.56 Super Light M-LOK Free Float Handguard w/Partial Top Rail Includes steel barrel nut screws (2) shim rings for barrel nut timing (2) 3 slot M-LOK rail segments (2) 7 slot M-LOK rail segments and M-LOK screw set. Package Contents: Presma 223/5.56 Super Light M-LOK Free Float Handguard w/Partial Top Rail Barrel nut fixing hardware Presma UMMARA15: 223/5.56 Super Light M-LOK Free Float Handguard w/Partial Top Rail 15 in Black