This aftermarket replacement SIG MPX PCC 12.76" handguard features a built in Picatinny top rail for accessories and seven rows of M-Lok slots. The replacement handguard for your SIG MPX Carbine is slim and light weight and utilizes standard factory mounting points and hardware, so no modifications to your Sig MXP firearm is necessary. The M-Lok handguard is precision CNC machined from hard-anodized aluminum with lightweight construction for rugged performance without weighing you down. The slim design remains true to the unique lines of your MPX rifle but provides a built in Picatinny top rail and seven planes of M-LOK mounting surface to accommodate todays modern M-LOK accessories. Aim sports limited lifetime warranty.