JL Billet MBS Picatinny Rail Attachment Black. Modeled after the MIL-STD-1913 rail to fit accessories with this configuration. Perfect for installing a monopod to level out the rear of your rifle. Simply remove the bottom base bolts from your MBS and install the rail with the provided hardware. Can be used with Magpul sling adapters Specifications for JL Billet MBS Picatinny Rail Attachment: Manufacturer: JL Billet Color: Black Weight: 0.2 lb Country of Origin: USA Features of JL Billet MBS Picatinny Rail Attachment Picatinny rail attachment for JL Billet MBS Package Contents: JL Billet MBS Picatinny Rail Attachment JL Billet JLB-MBS-PA: MBS Picatinny Rail Attachment Black