TSP TAC AR15/ M4/ M16 Drop-in Mount Solutions (7" Free-FIoat) Go to amazon.com Related posts Top 9 recommendation m4 handguard rail for 2022 FeatureStandard slots for attaching accessories.Machined using premium Aluminum, hard coat anodized (matte black)Easy installation, no modifications neededEnd Cap Included. DescriptionTSP