Ergo Grip 10-slot 4in X .400 Ergo Aluminum U.M.P. w/Ergo Rail Cover 1 Mounting Hole & 1 Slot. The mounting does not require any fancy maneuvers nor does it require alteration of the AR Handguard heat shields. The Ergo Aluminum U.M.P includes socket head mounting bolts with special flat nuts for an unobtrusive mount. So while there is minimal labor to install all the pieces are included and it is super-easy. Not only are the mounting bolts included a LowPro rail cover is included as well. Don't wait any longer; get your Ergo Grips Aluminum UMP now Specifications for ERGO 10-Slot Aluminum Rail Mounting Platform w/ Radiused Adapter Base: Manufacturer: ERGO Color: Black Finish: Anodized Fabric/Material: Aluminum Gun Rail: Picatinny Gun Type: Shotgun Rifle Gun Make: AR Platform Kalashnikov Gun Model: AK-74 AR-10 AK-47 AR-15 Condition: New Quantity: 1 Features of ERGO 10-Slot Aluminum Rail Mounting Platform w/ Radiused Adapter Base Mounting does not require alteration of AR Handguard heat shields Package Contents: ERGO 10-Slot Aluminum Rail Mounting Platform w/ Radiused Adapter Base Ergo Grip 4754: 10-slot (4") X .400 Ergo Aluminum U.m.p. W/ergo Rail Covers (1 Mounting Hole & 1 Slot)-black